Fact 1: When a river floods , that river deposits soil in flood plains.

Fact 2: When the river is full, it floods into the flood plain and leaves behind fertile soil.

Given the two facts above, answer the question "Where do plains get soil from?" with the following options: 
- earth
 - hurricanes
 - Sediment
 - ocean
 - canyons
 - wind
 - climate
 - floods


 

        floods 