Which choice describes a community? a. desert b. a forest of birds, insects, and squirrels c. a hole in which a snake lives d. a desert of sand, rocks, hawks, and snakes

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 answer is a) a shiprock was formed by igneous process