Answer:
A. They eat nitrogen-containing compounds found in the soil.
Explanation:
Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. 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.
The answer to number 6 is a.
Carbon dioxide, methane, water vapor, and a few other atmospheric gases trap heat energy and maintain earths temperature range
Honestly it would be the Exosphere<span> but since that's not one of the choices it would be the Thermosphere. </span>
