Which of the following is NOT a stage in mosquito development?

The correct choice in this scenario is that "Lava" is not a stage in mosquito development. Mosquito development consists of four distinct stages: egg, larva, pupa, and adult.

The larval stage is critical, as mosquitoes begin as eggs that hatch into larva, where they spend a significant amount of time feeding and growing. The pupa stage follows, during which the mosquito undergoes transformation in a protected state. Finally, the adult mosquito emerges from the pupa and matures into a fully developed insect capable of reproduction.

Understanding the stages of mosquito development is essential for effective control measures, especially in identifying which stages are vulnerable to treatments. The term "Lava," however, is a misnomer and does not pertain to any biological stage in mosquito life cycles, thereby making it the correct answer to the question posed.