Adelta is formed by deposition of sediment at the mouth of a river by water fanning out, and rivers provide a water supply. Given these facts, what is formed by deposition of sediment at the mouth of a water supply fanning out among the following options:
- a hurricane
 - soils
 - a delta
 - an ocean
 - soft soil
 - an island
 - detritus
 - spring


 

   a delta      