Identify the correctly punctuated sentence.

19. a) Throwing the football, is difficult for some people.
b) Throwing the football, he pulled a muscle in his arm.
c) Throwing, the football, kicking field goals and tackling are all important.
d) Throwing the football he did not notice the coach approaching.

d) Throwing the football he did not notice the coach approaching.

The correctly punctuated sentence is:

d) Throwing the football, he did not notice the coach approaching.

The correctly punctuated sentence is option d) "Throwing the football he did not notice the coach approaching."

To identify the correct sentence, we need to make sure that the punctuation is used correctly.

In option a), there is a comma after "football," which creates a sentence fragment. It should be followed by a subject and verb to form a complete sentence.

In option b), the comma after "football" is used correctly to separate a dependent clause ("Throwing the football") from the main clause ("he pulled a muscle in his arm").

In option c), there are extra commas around "the football" and "kicking field goals and tackling." These unnecessary commas disrupt the sentence structure.

In option d), there is only one comma, which is correctly used to separate the dependent clause ("Throwing the football") from the main clause ("he did not notice the coach approaching"). The sentence is complete and punctuated correctly.