You are presented with the question "What moves sediment downstream?" and the following answer choices: 
- streams.
 - High winds
 - streams
 - rivers
 - Fish
 - Tourists
 - Currents
 - flooding

Now knowing that asandbar is formed by water moving sediment downstream and shoreline currents carrying sediments build sandbars and spits across bay mouths, choose the best answer.


 

       Currents  