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

Fact 2: Rocks and sediments are pushed along the river.

Given the two facts above, answer the question "What forms sandbars?" with the following options: 
- soils
 - rivers
 - cellulose
 - Collagen
 - streams
 - soft soil
 - flooding
 - rain


 

  rivers       