Question

Malaria is a disease that is spread by mosquitoes. Mosquitoes lay eggs in stagnant water. Which of the following methods would help to control the number of mosquitoes?
i. Taking medicines that prevent malaria.
ii. Put a thin film of oil on the surface of stagnant water.
iii. Keeping the surroundings dry.
iv. Spraying chemicals that kill mosquitoes.
a. Only (i)
b. Only (ii) and (iii)
c. Only (i), (ii) and (iii)
d. Only (ii), (iii) and (iv)

Answer 1

d. Only (ii), (iii) and (iv)

Hope it's helpful to you

Answer 2

Answer:

only(ii),(iii)and(iv)