I had to correct the following fragment sentence error. Please advice if they are correct. Thank you in advance for your help.

1. It is true that the first drive-in theaters opened in New Jersey in 1933, which was in the middle of the Great Depression when money was scarce.
2. It is true that by 1958 there were over 4,000 drive-ins the United States as recorded by the United Drive-in Theatre Owners Association.
3. It is true that the number of drive-ins have fallen drastically perhaps because escalating land prices make property to valuable for use in this way or the fact that they are open only during the summer months in some areas.
4. It is true that there are only 430 drive-ins left in the country, including the American territories.
5. It is true that other outdoors summer activities are also endangered for instance the miniature golf industry down from 50,000 courses in the 1930s to fewer than 15,000 today.

I don't know why each sentence begins with "It is true that."

Sentences 1 and 4 are correct.

I had to correct each sentence using "It is true that" test, identify the fragment and complete sentences.

Hope this is helpful

So with that said is 5 incorrect.

Thank you again for your help.

Sentence 5 is a run-on sentence.

5. It is true that other outdoors summer activities are also endangered, for instance the miniature golf industry down from 50,000 courses in the 1930s to fewer than 15,000 today.

Is it correct now

Thank you for your assistence very much appreciated.

1. The first drive-in theaters opened in New Jersey in 1933, in the middle of the Great Depression when money was scarce.

2. By 1958 there were over 4,000 drive-ins the United States, as recorded by the United Drive-in Theatre Owners Association.

3. The number of drive-ins has fallen drastically perhaps because escalating land prices make property too valuable for use in this way / or the fact that they are open only during the summer months in some areas. WAAAAYYYY TOO LONG FOR ONE SENTENCE. DIVIDE AT THE / AND REVISE.

4. there are only 430 drive-ins left in the country, including the American territories. OK

5. Other outdoor summer activities are also endangered / for instance the miniature golf industry down from 50,000 courses in the 1930s to fewer than 15,000 today. RUN-ON; DIVIDE AT THE / AND REVISE.

1. The corrected sentence: It is true that the first drive-in theaters opened in New Jersey in 1933, which was in the middle of the Great Depression when money was scarce.

The sentence appears to be correct. It provides information about the first drive-in theaters opening in New Jersey in 1933, during the Great Depression.

2. The corrected sentence: It is true that by 1958 there were over 4,000 drive-ins in the United States, as recorded by the United Drive-in Theatre Owners Association.
The sentence appears to be correct. It states that by 1958, there were over 4,000 drive-ins in the United States, as documented by the United Drive-in Theatre Owners Association.

3. The corrected sentence options:
a) It is true that the number of drive-ins has fallen drastically, perhaps because escalating land prices make property too valuable for use in this way or due to the fact that they are only open during the summer months in some areas.
b) It is true that the number of drive-ins has fallen drastically, perhaps because escalating land prices make property too valuable for this use or because they are only open during the summer months in some areas.

Both options above provide a correct correction for the sentence. They state that the number of drive-ins has significantly decreased, possibly because land prices have risen and made the property too valuable for such use. Additionally, they mention that some areas only operate drive-ins during the summer months.

4. The corrected sentence: It is true that there are only 430 drive-ins left in the country, including the American territories.
The sentence appears to be correct, stating that there are currently only 430 drive-ins remaining in the country, including the American territories.

5. The corrected sentence: It is true that other outdoor summer activities are also endangered. For instance, the miniature golf industry has declined from 50,000 courses in the 1930s to fewer than 15,000 today.
The sentence appears to be correct, mentioning that other outdoor summer activities, like the miniature golf industry, are also at risk. It provides specific information about the decline in the number of miniature golf courses, reducing from 50,000 in the 1930s to fewer than 15,000 today.