What are the two main body parts of mosquito pupae?

The correct choice identifies the two main body parts of mosquito pupae as the cephalothorax and abdomen. In the life cycle of mosquitoes, the pupal stage is an essential transition period where the organism undergoes significant transformation.

In this context, the cephalothorax represents a combined structure that includes features of both the head and the thorax, which is typical in the anatomy of many aquatic insects, including mosquitoes during their pupal stage. The abdomen follows as a distinct part that has its own specialized functions. Understanding this anatomical structure is important for recognizing how certain insecticides might affect mosquitoes during their developmental stages, particularly in aquatic environments.

The other options do not accurately describe the mosquito pupae's anatomy, as they either incorrectly separate the head and thorax into distinct parts or incorrectly identify structures that are not present in the pupal stage. Focusing on the cephalothorax and abdomen provides crucial insight into mosquito biology and behavior, which is essential for effective pest management strategies.