is a way of solving problems and finding answers to questions using observation and investigation to gain knowledge about events in nature. I'll give brainliest for this answer?

the scientific method

Explanation:

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The scientific method

Explanation:

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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.

i believe it would be c: tons.