What is communicate and why do we communicate​

The definition I put below answers both of your questions, hope this helped!

Explanation: Communication is the act or process of using words, sounds, signs, or behaviors to express or exchange information or to express your ideas, thoughts, or feelings to someone else.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

the answer is c a tornado