Too many ways. One being that some cultures encourage women to be more womanly and to wear makeup and dress more feminine. Or some will influence men to be "strong" and not show their feelings.
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.
These are some of the most significant economic factors behind the stock market crash of 1929.