Fertility of soil can be improved by ________

A. Adding living earthworms

B. Adding dead earthworms

C. Removing dead earthworms

D. Removing living earthworms and adding dead earthworms

Answer: Option A

Solution(By Examveda Team)

Fertility of soil can be improved by adding living earthworms. Worms help to increase the amount of air and water that gets into the soil. They break down organic matter, like leaves and grass into things that plants can use. When they eat, they leave behind castings that are a very valuable type of fertilizer. Earthworms are like free farm help.