Question

By which specialized structure, the larva of mosquito breath?

Answer 1

Hint: Mosquitoes are insects with a trachea that allows them to breathe. They don't breathe through their mouths or noses; instead, oxygen enters their bodies through tiny pores called spiracles. Hair covers the spiracles to prevent dust and other particles from entering. The growing mosquito larvae, on the other hand, lack spiracles and so require a specific structure for gaseous exchange

Complete answer:
Mosquito larvae float on the water's surface and breathe through a specialized tube called a siphon tube.
A siphon is a tubular organ of the respiratory system that acts as a breathing tube in some insects, such as mosquito larvae that spend a substantial amount of time underwater.
A mosquito's life is generally split into four primary phases. The egg, larva, pupa, and adult are the four stages. The larvae have a unique body component called the siphon that allows them to breathe. At the water's surface, they take in oxygen. For a breath, the siphon attaches to the water's natural surface tension.
Several species have modified their siphons to allow them to pass through hollow aquatic plant stems. To breathe, these insects do not need to ascend to the surface.

Note:
Almost all species' larvae require repeated visits to the surface to acquire oxygen via a breathing tube known as a siphon. Coquillettidia and Mansonia larvae have modified siphons that enable them to puncture the stems of emergent plants in water and take oxygen from the plant. Because development necessitates a large quantity of energy, larvae are continually eating.