HELP PLEASEEE I don’t get this at all

You should say that the graph matches the scientists claim because the scientist says that the oxygen levels in the artery increase while the oxygen levels in veins decrease.

Explanation:

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.