What can many other forces do that friction forces cannot do?
a. stop motion
b. cause positive acceleration
c. cause motion
d. prevent positive acceleration

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 correcdt answer shoukld be a