One possible cause of extinction is

A possible cause of extinction, as in the case of the Dodo Bird, is being over-hunted 

A possible cause is a disruption in the food chain such as if wolves are removed bunnies overpopulate and a certain flower is overeaten and goes extinct.

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy