1.    Which of the following statements are true regarding dams? 

1.    It is a barrier that stops the flow of water and results in the creation of the reservoir. 

2.    It forms a form of electricity known as hydroelectricity. 

3.    Dams help in preventing floods. 

4.    It provides water for activities such as irrigation , human consumption and industrial use. 

Which of the above statements is/are correct?