Fact 1: Asandbar is formed by water moving sediment downstream.

Fact 2: Bare sandbars are the ideal spots for new stands of cottonwood.

Given the two facts above, answer the question "What is required for the ideal habitat for new stands of cottonwood?" with the following options: 
- sunlight
 - nutrients
 - warmth
 - Sediment
 - Black tar
 - Hot magma
 - trees
 - Chainsaws


 

    Sediment     