C The animals that live in the polar region have the following adaptation(s):

a.) all of the answers listed
b.) thick fur
c.) breed less often
d.) slow maturation

the answer should be A

Explanation:

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.

i'd say that the moon rock is about 2.2 billion years old.