What is the meaning of the term "eccentric" in relation to behavior?

The term "eccentric" in relation to behavior refers to actions or characteristics that are unusual and slightly strange. This descriptor often denotes someone who deviates from the established norms or expectations in ways that might be seen as quirky or unconventional. Eccentric behavior can include a variety of traits or habits that stand out in a social context, but it is not necessarily negative; instead, it can add a unique flavor to a person's character.

In the context of conventionality, the other options suggest traits that align more closely with typical or expected social behavior. The first choice implies behavior that is entirely standard and normal, which directly contrasts with the notion of being eccentric. The third choice focuses on sociability, which does not align with the unique or atypical nature of eccentricity. Lastly, the fourth choice describes someone who is reserved and quiet, characteristics that do not inherently embody the oddity or distinctiveness that define eccentricity. Thus, the correct understanding of "eccentric" highlights its association with being unusual and slightly strange.