Question

Earthworms are called 'friends of farmers' because they

• A. Are delicious and are used as food
• B. Are not harmful to them
• C. Are used as bait for fishing by them
• D. Help in soil fertility by increasing amount of clay and nitrogenous compound

Answer 1

The correct option is D Help in soil fertility by increasing amount of clay and nitrogenous compound

Earthworms reside in soil and move all round making the soil more porous.

Also their excretory products help in increasing the nitrogen content in the soil helping in plant growth. Therefore they are called the farmers' friends.

So, the correct answer is 'Help in soil fertility by increasing amount of clay and nitrogenous compound'