5. Rotating back and forth aimlessly. (1 point)

sentence
fragment
16. The fan blades spun rapidly, generating a strong cool breeze. (1 point)
sentence
fragment
17. The sound of ringing bells marked the end of a beautiful wedding service. (1 point)
sentence
fragment

16. The fan blades spun rapidly, generating a strong cool breeze. (sentence)

17. The sound of ringing bells marked the end of a beautiful wedding service. (sentence)

16. The fan blades spun rapidly, generating a strong cool breeze. (1 point)

- This is a sentence.

17. The sound of ringing bells marked the end of a beautiful wedding service. (1 point)
- This is a sentence.

In order to determine whether each of these statements is a complete sentence or a sentence fragment, we need to understand the difference between the two.

A sentence is a group of words that expresses a complete thought. It typically contains a subject (who or what the sentence is about) and a predicate (what the subject is doing or what is being said about the subject). A sentence must also make sense on its own and convey a clear meaning.

On the other hand, a sentence fragment is an incomplete sentence. It is a group of words that is missing either a subject or a predicate, or it does not express a complete thought.

Now let's analyze each statement:

5. Rotating back and forth aimlessly.
This statement does not contain a subject or a verb, and it does not express a complete thought. Therefore, it is a sentence fragment.

16. The fan blades spun rapidly, generating a strong cool breeze.
This statement contains a subject ("the fan blades") and a predicate ("spun rapidly, generating a strong cool breeze"). It also expresses a complete thought and makes sense on its own. Therefore, it is a sentence.

17. The sound of ringing bells marked the end of a beautiful wedding service.
This statement contains a subject ("The sound of ringing bells") and a predicate ("marked the end of a beautiful wedding service"). It expresses a complete thought and makes sense on its own. Therefore, it is also a sentence.

In summary:
- Statement 5 is a sentence fragment.
- Statements 16 and 17 are complete sentences.