When you answer someone who has asked you something, you say something back to them.

An answer is something that you say when you answer someone.

If you say that someone will not take no for an answer, you mean that they go on trying to make you agree to something even after you have refused.

If you answer a letter or advertisement, you write to the person who wrote it.

An answer is a letter that you write to someone who has written to you.

When you answer the telephone, you pick it up when it rings. When you answer the door, you open it when you hear a knock or the bell.

An answer to a problem is a solution to it.

Someone's answer to a question in a test or quiz is what they write or say in an attempt to give the facts that are asked for. The answer to a question is the fact that was asked for.

When you answer a question in a test or quiz, you write or say something in an attempt to give the facts that are asked for.

Your answer to something that someone has said or done is what you say or do in response to it or in defence of yourself.

If you answer something that someone has said or done, you respond to it.

If you say that something is a place's answer to a famous thing, you mean that the first thing is the equivalent of the second in that place.

If something answers a need or purpose, it satisfies it, because it has the right qualities.

If someone or something answers a particular description or answers to it, they have the characteristics described.