Which factors characterize biomes a) biotic factors only b) abiotic factors only c) both biotic and abiotic factors d) neither biotic nor abiotic factorsi need it quick

C) Both

Hope this helps

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.