What does the term "alias" refer to?

The term "alias" refers specifically to a name that is not one’s true name. It is commonly used to describe a pseudonym that a person adopts, often for the purpose of concealing their identity or for a particular context, such as in a creative or professional setting. This term is used in various fields, including literature, law enforcement, and online identities.

The other concepts in the choices do not relate to the definition of "alias." The idea of an expert in a field captures an entirely different concept, focusing on a person's skills and knowledge rather than their name. Similarly, the notion of an agreement or consent pertains to legal or formal contexts, while sharing resources among peers refers to collaborative efforts, which are also unrelated to identity or names. Therefore, the choice indicating that an alias is a name that is not one’s true name is the most fitting and accurate understanding of the term.