Are you referring to calcium carbonate?
This answer is c radiolarians
The answer is totally D. Chemical messenger !
none of the others really make sense haha
Answer:
Carbon makes its way through living things as carbon-based compounds, like vitality particles, fats and proteins, in the long run cycling its way back into the environment. Nitrogen is basically found within the air as well and enters the environments as supplements for plants. Water, nitrogen and carbon cycles. Carbon moves from the air and back by means of creatures and plants. Nitrogen moves from the environment and back by means of living beings. Water moves on, over, or underneath the surface of the Soil.
Explanation:
I think it’s called chronic bronchitis
