Which of the following correctly describes the importance of the nitrogen cycle?

to recycle carbon dioxide in the atmosphere

to replenish carbon dioxide in the ground

to decompose dead animals

to provide plants with needed ammonia

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters