Correct me if I'm wrong but I believe it is phrase or clause containing three or more words at the beginning or end of a sentence.
Answer:
C. It uses imperfect coordinating structure
Explanation:
Here is just one way to fix the sentence:
The family wants to vacuum, dust, and straighten up the whole house.
Observing nature is great because you can learn so much about the world around you.
Obseving the earth can help you make new discoveries
I want to see "Catching Fire" because everyone else has already seen it.
