Fact 1: Damming a river can cause a lake to form.

Fact 2: Water in the lakes is fresh, cool and transparent.

Given the two facts above, answer the question "What is the thing that is created by damming a river made of?" with the following options: 
- Sediment
 - Fresh water
 - loose soil
 - swamp vegetation
 - mussels
 - storing water
 - body water
 - carbon dioxide


 

  Fresh water       