A( can withstand high blood pressure due to the thickness of its and
select one:
a. vein; smooth muscle; elastin
b. vein; smooth muscle; tunica intima
c. artery; smooth muscle; elastin

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

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.