What is the best definition for the word comply?

The term "comply" means to act in accordance with a wish or command, or to conform to a rule or request. The definition "Follow" accurately captures this meaning, as it implies adhering to guidelines, directives, or expectations set by others. When someone complies, they are essentially following the instructions or requirements put forth, which is the essence of the word.

In contrast, "Affect" relates to influencing something, which is not aligned with the meaning of complying. "Depend" refers to relying on something or someone, which again diverges from the idea of conforming or following a set standard. Lastly, "Decline" means to refuse or reject something, which is the opposite of what it means to comply. Therefore, "Follow" is the best match for the meaning of "comply."