Ascientist finds several hundred fish fossils in the desert. this evidence best supports which of the following scientific ideas? a. the fish were left by predatory animals. b. the fish evolved limbs for land movement. c. the area was once covered in water. d. the area was once covered by a glacier.

C.The area was once covered in water.

Explanation:

The fossils are the trace evidences of the previously existing living beings on a particular location. The fossils reveal the type of life forms associated with a particular region, the climate and geographic landform condition associated with the region where the fossils were found.

The fossil of fish in a desert area indicates that the area might be occupied with a water body, which is being wiped out due to desertification.  

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 might be wrong but i think its a. let me know if i’m right and have a good rest of your day!