What action is implied by the term "surrounded" in relation to the fans?

The term "surrounded" in relation to the fans suggests being encompassed or enveloped by something, which aligns closely with "engulfed." This term conveys a sense of being completely enclosed or enveloped, often in a way that may imply intensity or immersion. When someone is surrounded, they are typically within the reach or presence of other things or people, which can create a feeling of being overwhelmed or fully encompassed.

On the other hand, the other choices do not accurately capture this sense of total enclosure. For instance, "encouraged" refers more to a support or positive reinforcement context, while "separated" implies a lack of connection or distance. "Dispersed" suggests spreading out or scattering, which is contrary to the idea of being surrounded. Therefore, "engulfed" is the most fitting synonym in this context.