What is the plural term for the last segment of an insect's legs?

The plural term for the last segment of an insect's legs is "tarsi." This term is derived from Latin, where the singular form is "tarsus." In entomology, the tarsus is an important part of an insect's leg, functionally serving as an adaptive structure that provides support and flexibility necessary for movement and interacting with the environment.

The usage of "tarsi" accurately reflects the standard nomenclature in biological sciences, ensuring clarity and consistency when discussing the anatomy of insects. This terminology is not only specific to entomology but also applies to other arthropods, where multiple tarsi are found in various segments of their legs, maintaining the same plural form. The other options do not conform to established scientific terminology used in the field.