Question

which sentence uses this meaning of nerve?
nerve noun boldness; courage
it takes nerve to face a bully and stand up for yourself.
when you hit your funny bone, it tickles a nerve.

Explanation:

We need to find the sentence where "nerve" means "boldness; courage". In the first sentence, "It takes nerve to face a bully and stand up for yourself" implies that facing a bully requires courage (boldness), matching the given definition. The second sentence uses "nerve" to refer to a physical nerve (a part of the body), not the meaning of boldness/courage.

Answer:

It takes nerve to face a bully and stand up for yourself.