Some forests have trees that shed their leaves every year and grow new ones in the spring. Which argument best describes how some bacteria are beneficial to these forests?

A.
Bacteria prevent the trees from losing their leaves.
B.
Bacteria develop into new leaves for the trees.
C.
Bacteria provide food for the leaves on the ground.
D.
Bacteria break down fallen leaves to release nutrients.

D.

Bacteria break down fallen leaves to release nutrients.