Oil is sprayed over stagnant water in which mosquitoes breed in order to

A. provide a landing surface for the adult
B. prevent larva or pupa from attaching itself to the surface
C. prevent the water from overheating
D. lubricate the larva for easy movement
E. provide a surface for laying their eggs

Correct Answer: Option B

B. prevent larva or pupa from attaching itself to the surface

Explanation:

A thin coating of oil on top of water suffocates mosquito larvae, killing them quickly. Use natural oils, such as olive oil or vegetable oil, for this control method. You also can use cinnamon oil. You only need 1 teaspoon of oil per gallon of water. Do not use this method on ponds and other bodies of water that contain fish.