Nitrogen is most abundant in the but cants be absorbed by the without the of special bacteria and a process called nitrogen fixation

The correct answers are Atmosphere and biosphere. Nitrogen is most abundant in the atmosphere, but nitrogen can't be absorbed by the biosphere without the help of a special bacteria and without undergoing a process called nitrogen fixation. 

c

explanation:

accomplishment : zachary taylor’s was a national war hero in his battle in an mexican war

explanation:

he was known as a national war hero for his battles in the mexican war, taylor was elected as the 12th president of the united states in 1849. he led the nation during its debates on slavery and southern secession. after serving only 16 months in office, taylor died from cholera morbus on july 9,