Scientists can use many strategies during investigations, including fieldwork, surveys, models, and experiments. Which of these phrases best describes an experiment?

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 correct option is option d

do yall know the answer?

feral cats are estimated to eat tens of millions of native animals each night in australia