Which term would most likely refer to a peak in social media engagement?

The term that most likely refers to a peak in social media engagement is a spike in likes and shares. This expression indicates a significant and sudden increase in user interactions with content, such as when users actively engage with posts by liking, sharing, or commenting. A spike in likes and shares indicates heightened interest and activity among the audience, suggesting that the content resonated well with users or reached a wider audience.

Other choices reflect situations that do not indicate engagement peaks. A decline in followers suggests a loss of interest or engagement, a sudden drop in activity indicates a decrease in user interactions, and a consistent level of interaction signifies stable but unremarkable engagement, rather than a peak. Therefore, the best representation of an increase or peak in engagement is indeed a spike in likes and shares.