Question

which living thing is responsible for changing nitrogen into different forms in the soil?
fungi
animals
plants
bacteria

Explanation:

Bacteria play a crucial role in the nitrogen - cycle in soil. They can fix atmospheric nitrogen into ammonia, convert ammonia to nitrites and nitrates, and also carry out denitrification. Fungi, animals, and plants are not the main agents for changing nitrogen into different forms in soil.

Answer:

D. Bacteria