Fact 1: Adelta is formed by deposition of sediment at the mouth of a river by water fanning out.

Fact 2: Deltas are usually fan-shaped deposits of sediment that form where currents slow at a river's mouth.

Given the two facts above, answer the question "Fan-shaped deposits of sediment form where?" with the following options: 
- mouth of rivers
 - bottom of oceans
 - flooding
 - near the shoreline
 - the Great Barrier Reef
 - entrance of puddles
 - unidirectional
 - top of canyons


 

 mouth of rivers        