C and D are the right answer. I hope this helps (please give me brainliest)
Answer:
They provide food for living things.
Some aid in the nitrogen cycle.
The most important is that they decompose organic material.
Explanation:
Answer:
Explanation:
some gases prevent the escape of heat from the earth.There will be an increase in the percentage of such gases would cause the average temperatures to increase world wide.This is known as greenhouse effect.Carbon dioxide is one of the green house gases.An increase in the carbon dioxide content in the atmosphere woul cause more heat to be retained by the atmosphere and lead to global warming.
