Step-by-step explanation:
A dam is an artificial barrier that controls the flow of water.
Dams are very useful for the following reasons:
- They are sources of hydro-electric power production: most dams in the world are used to generate this environmentally friendly source of power. The water in the dam is used to drive heavy turbines which in turn produces electric current.
- They are sources of water for irrigation: during the dry season when water is scanty, water in the dam can be channeled for farming and other agricultural purposes.
- A potential source of tourism: they are used in generating revenue as result of their touristic outlay.