Mosquito Egg-Laying and Blood-Feeding Habits

Steps:

• Identify mosquito egg-laying site: Females deposit eggs on water surfaces, preferring stagnant water to avoid currents.
• Confirm blood-sucking sex: Only adult females require blood for egg development; males feed on nectar.
• Assess choice A: Egg site incorrect, as eggs need water, not just decaying material.
• Assess choices B-D: B has wrong water type (running disrupts eggs); C matches both facts; D errs on sex (males don't suck blood).

Why C is correct:

• Stagnant water provides stable conditions for egg hatching, and only females suck blood to obtain protein for reproduction.

Why the others are wrong:

• A: Eggs require standing water, not solely decaying organic material.
• B: Mosquitoes avoid running water, as it can wash away eggs.
• D: Males do not suck blood; they lack the mouthparts and need.

Final answer: C