Answer:
A claim
Explanation:
I'm not 100% sure since there can be a lot of different answers for fill in the blank questions like this, but a claim is a statement, assertion, or opinion that isn't necessarily fact based, so you would need to prove it.
(Hopefully that helped!)
The fourth revision is correct. it says who was strolling in the sidewalk.
Answer:
valuable is the correct answer
1. look over it quickly to get a sense of its contents.