If climate change increases the overall temperature of the earth, glaciers can melt into the ocean. If that happens, what would be the spheres involved?
A. cryosphere and hydrosphere
B. geosphere and atmosphere
C. cryosphere and biosphere
D. hydrosphere and atmosphere

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

actually the answer is c