What type of cell is designed specifically for raising a second queen during swarming?

The correct choice is the type of cell specifically designed for raising a second queen during swarming, known as a swarm cell.

When a bee colony prepares to swarm, it creates these specific cells, which are larger than standard brood cells, typically found on the lower parts of the frames. The purpose of these swarm cells is to rear additional queens that will emerge as the current queen leaves the hive with a portion of the worker bees. This is essentially a means of reproduction for the colony to ensure its survival. The development of swarm cells is a critical adaptation for colonies to reproduce and establish new colonies, reflecting their natural reproductive behavior.

While supersedure cells are also used to raise new queens, they are specifically meant to replace a failing or aging queen rather than for swarming purposes. Brood cells are the standard cells where worker and drone bees are reared, and pollen cells are designated for storing pollen, not for raising queens. Thus, swarm cells are uniquely suited for the swarming process, emphasizing their importance in the life cycle of honeybee colonies.