Samantha believes that gabe is a member of the football team because he is muscular and wears gym shorts. this typically illustrates:

The representatives heuristic because she is making judgments and assumptions based on his physical appearance

Representative herusitic refers to the tendency to form a conclusion in an event of uncertainty. In this particular case, samantha correlate that since Gabe is muscular, than he must be undergone some training which resulted in that body.