Answer:
try a human shivers on a cold day that should be correct.
Explanation:
Optometrist is what they are called
Answer:
A blood clot
Explanation:
It is formed to stop bleeding and foreign bodies from entering the body.
Answer:
Nitrogen cycle
Explanation:
Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a natural or an industrial means to a form of nitrogen such as ammonia. In nature, most nitrogen is harvested from the atmosphere by microorganisms to form ammonia, nitrites, and nitrates that can be used by plants.