How does nitrogen in the atmosphere become beneficial to plants and eventually animals?

All plants and animals need nitrogen to make amino acids, proteins and DNA, but the nitrogen in the atmosphere is not in a form that they can use.

Explanation:

When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.

i believe it is c: genes for body color and wing size are inherited separately from each parent.