The natural flow of rivers can be affected by several factors, such as building dams to provide drinking water, pumping of groundwater, climate change, and building of lands that change how natural water runs into surfaces and into rivers. All of these also disrupt the balance of ecosystem in the area.
Homeostasis:
<em>The tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes</em>
They are the light reactions and calvin cycle. The products from light reactions are ATP and NADPH
<span>C. nitrogen and hydrogen shoould be your answer
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