Which part of the honeybee is made up of several structures that help in feeding?

The proboscis is a highly specialized feeding structure found in honeybees and many other insects. It is an elongated mouthpart that allows bees to access nectar from flowers. The proboscis is composed of several components, including the tongue and various other structures that work together to facilitate the feeding process. When a bee lands on a flower, it extends its proboscis to reach the nectar, which it then sucks up and stores in its crop for later use or transport back to the hive.

This is why the proboscis is the correct answer; it is specifically designed for feeding and is integral to the honeybee's role in foraging and pollination. The other options, while they do include parts of the mouth or head, do not serve the primary function of feeding in the way the proboscis does. For instance, the flabellum is associated with the honeybee's mouthparts but is not directly responsible for feeding. The labrum is part of the insect’s mouth structure but does not play a significant role in the feeding mechanism compared to the proboscis. The clypeus acts as a shield-like structure that protects other mouthparts but is not involved in the feeding process itself.