High concentrations of sediment in the water can block out sunlight needed by aquatic plants for photosynthesis. This condition will most likely result in
a
decreased concentrations of nitrogen.
b
increased concentrations of nitrogen.
c
decreased concentrations of oxygen.
d
increased concentrations of oxygen.

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explanation:

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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.