How does your brain communicate with the rest of your body? by sending signals through cells called neurons by allowing you to think very deeply by moving your muscles to create action all answers are only partially correct

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.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.