Final answer:
Wilhelm uses mimicry to copy the behavior of other spectators at a football game to understand the norms and expectations in that setting.
Step-by-step explanation:
Wilhelm is using mimicry as a strategy when he observes and then copies the behavior of other spectators at a football game.
This social behavior can help individuals like Wilhelm understand the unwritten rules and social influence in situations that are unfamiliar to them. This term refers to an individual's action that imitates or replicates another's behavior, often to fit in or understand the context better.