Why is air an important natural resource?

a. it has many important uses.
b. it is made of a mixture of gases.
c. it is made of different chemicals.
d. it is contained in the atmosphere.

The answer is B because air is made up of a lot of mixture

A.

Explanation:

If it did not have important uses then it would not be so important.

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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.