What is a claim?

a reason that tells why something is true or untrue
ideas that oppose a belief
the statement of an argument
facts and examples that support an opinion

The statement of an argument.

are you sure

Yes, I am sure that a claim is the statement of an argument. A claim is typically a clear and concise statement that expresses a position or a belief about a particular issue or topic. It is the central point being made and is used to support or justify a particular perspective or opinion.