Answer:
plate tectonics which collide every time a earthquake occurs
Explanation:
The correct answer is<span> a. release of contaminants
If you produce hydroelectric energy, you disrupt the water flow by building dams and power-plants, which also disrupts the aquatic wildlife that inhabits those areas. This also increases riverbed erosion because the water is accumulated and reaches further into the shore. </span>
I'm pretty sure its Nairobi, Kenya.
The study of the movement of lithospheric plates comprising the earth's crust is called plate tectonics.