Ais a membrane-bound sac found in cells that contains digestive enzymes which break down complex molecules or structures. mitochondrion ribosome chloroplast lysosome\

Lysosome

Explanation:

We're learning about cells and this is the correct answer. I hope this helps! :D

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.