When does a bee release alarm pheromones?

A bee releases alarm pheromones primarily when danger is sensed or when a bee stings. This chemical communication serves as a warning signal to other bees in the colony, indicating a threat or an intruder that could harm the hive. The release of these pheromones triggers a defensive response from nearby bees, urging them to prepare for potential confrontation or to protect the hive from intruders. Alarm pheromones are crucial for the survival of the colony, promoting collective defense mechanisms.

The other options presented do not accurately reflect the circumstances under which alarm pheromones are released. For instance, while food presence and busy activity within the hive may induce different behaviors and communications among bees, they are not triggers for alarm pheromones. Additionally, the laying of eggs by a queen does not result in the release of alarm pheromones, which are specifically linked to situations of danger rather than routine colony functions.