Which of the following describes conformity?

The correct choice describes conformity as a change in one's behavior due to the influence of others. Conformity occurs when individuals adjust their opinions, feelings, or behaviors to align with those of a group or societal norms. This phenomenon is often driven by the desire for social acceptance or the belief that the group may have more valid information about the situation.

In this context, conformity emphasizes the role of social influence, highlighting how external factors, such as group pressure or the desire to fit in, can lead to modifications in behavior. This significant aspect of social psychology illustrates how people's actions can be shaped by the presence and expectations of others, making it a central theme in understanding social dynamics.

Other options focus on aspects not inherently tied to social influence. For instance, a change in behavior due to personal preference highlights individual agency rather than social pressure. A decision made without external pressure suggests autonomy, which contradicts the essence of conformity. Similarly, a voluntary agreement to group standards may imply a conscious choice that doesn't necessarily stem from influence but rather a preexisting alignment with group norms. Therefore, the best description of conformity is the direct impact of others on an individual's behavior.