How is usable nitrogen obtained by animals?
a. they produce it in their chloroplasts
b. they get it by eating plants.
c. they get it from the soil.
d. they breathe it in from the air

not sure if this is what you'r looking for nnew= nold

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

carbon atoms, hydrogen, oxygen, and nitrogen.