Pheretima posthuma is highly useful as

Options

A. their buffows make the soil loose
B. they make the soil porous, leave their castings and take organic debris in the soil
C. they are used as fish meal
D. they kill the birds due to biomagnification of chlorinated hydrocarbons

Answer

B

Explanation

Pheretime posthuma is useful for farmers as they enrich the soil by their excretory wastes and make the soil porous.