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

Fact 2: Native species, such as cranes, use open water and barren sandbars for roosting at night.

Given the two facts above, answer the question "What happens on the formation where water moves sediment downstream?" with the following options: 
- mechanical
 - watershred
 - erosion
 - cranes roost
 - near the shoreline
 - streams.
 - it can be seen
 - swamp vegetation


 

    cranes roost     