Fandom refers to the community of fans who share a common interest in a particular subject.

Fan culture is characterized by enthusiasm, passion, and engagement with the subject matter.

Stans are fans who are extremely dedicated and enthusiastic about a particular subject.

Fan clubs are not a common form of fan expression, as they are typically organized by the creators or distributors of the subject matter.

All of the options are terms used to describe a fan who creates and shares their own creative works inspired by a particular subject.

Fan mail is not a common way for fans to interact with each other, as it is typically a one-way communication from fans to the creators or distributors of the subject matter.

Immersion is the term used to describe the phenomenon of fans becoming emotionally invested in the characters or storylines of a particular subject.

Boycotting the subject matter is not a common way for fans to show their support, as it typically involves actively avoiding or protesting against the subject matter.

Fan fiction is the term used to describe the phenomenon of fans creating and sharing their own stories and scenarios based on a particular subject.

Cosplaying as characters from the subject matter is not a common way for fans to express their creativity within a fandom, as it typically involves purchasing or creating costumes and props.

Shipping is the term used to describe the phenomenon of fans shipping two characters from a particular subject together in a romantic or sexual relationship.

Avoiding all discussions and interactions related to the subject matter is not a common way for fans to celebrate their fandom, as it typically involves actively engaging with the subject matter and other fans.

Fan videos is the term used to describe the phenomenon of fans creating and sharing their own fan-made music videos, edits, and remixes based on a particular subject.

Ignoring the subject matter completely is not a common way for fans to show their appreciation, as it typically involves actively engaging with the subject matter and other fans.

Fan games is the term used to describe the phenomenon of fans creating and sharing their own fan-made games, mods, and expansions based on a particular subject.