What defines the concept of 'gender expression'?

The correct choice identifies 'gender expression' as the performance and presentation of gender to others. This concept encompasses how individuals communicate their gender identity through various forms such as clothing, behavior, hairstyle, and mannerisms. Gender expression illustrates the ways in which individuals manifest their gender identity in social contexts, allowing others to perceive and interpret their gender.

In sociological perspectives, gender expression is recognized as distinct from biological or legal definitions of gender, which relate more to one's physical characteristics or formal recognition. This distinction highlights the social and cultural aspects of gender, emphasizing that expression can vary widely across different societies and contexts.