What structures help swing the proboscis from underneath its chin?

The structures that help swing the proboscis from underneath its chin are the cardo and lorum. The cardo is a part of the insect's mouthparts that functions as a hinge, allowing for the movement of the jaw and other components of the mouth, including the proboscis. The lorum is associated with the cardo and helps in the articulation and manipulation of the proboscis, facilitating its extension and retraction during feeding.

In honeybees and other insects, the proboscis is crucial for sucking nectar and other fluids. The proper functioning of the cardo and lorum is essential for this feeding mechanism, as they provide the necessary mobility and flexibility needed to extend the proboscis effectively from the mouth. Therefore, the coordination between these two structures plays a significant role in how the insect is able to engage with flowers and obtain nourishment.

The other options represent different structures that have distinct functions. Hamulii are hook-like structures that help link the wings together but do not serve in moving the proboscis. The glossa is involved in the structure of the proboscis itself, particularly in the feeding process, but it does not facilitate the swinging movement from under the chin. The flabellum pertains more