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.
Evaporation i believe has a big role...
The answer is <span>Endergonic reaction.
In the endergonic reactions, energy is used. In the exergonic reactions, energy is released. Since </span><span>energy is used in photosynthesis, it is the endergonic reaction. </span>