Answer:
"Look at this fossil I bought at the gift shop,"
Explanation:
"It," causes the sentence to become a run-on, and therefore isn't grammatically correct. However, if the sentence said, "Look at this fossil I bought at the gift shop," then it would have no need to be changed, as it is a full sentence in itself with no run-on.
I think you can tell the answer is odd because the multipliers are odd.
Not sure what you mean here
