Fact 1: Hydropower requires damming a river.

Fact 2: Hydropower is a renewable resource.

Given the two facts above, answer the question "What can provide a renewable resource?" with the following options: 
- By coral exoskeletons
 - oil
 - fossil fuel
 - damming a river
 - gas
 - peachleaf willow
 - sunlight
 - Electrical energy


 

    damming a river     