Mosquito Stages in Aquatic Habitats

Steps:

• Recall mosquito life cycle: eggs laid on water surface, larvae and pupae develop underwater, adults emerge and leave water.
• Identify drainage effect: removes standing water, eliminating breeding sites.
• Match stages to water dependency: eggs, larvae, pupae need water; adults do not.
• Select option listing only water-dependent stages.

Why B is correct:

• Eggs, larvae, and pupae require stagnant water for development and survival, per mosquito biology.

Why the others are wrong:

• A: Includes adult, which lives independently of water after emergence.
• C: Includes adult and omits larva, a key water-bound stage.
• D: Includes adult and excludes egg, the initial water-laid stage.

Final answer: B