You are presented with the question "What can lead to the gradual burial of more sediments?" and the following answer choices: 
- erosion
 - loose soil
 - an ocean
 - a wave
 - a delta
 - wind
 - a lake
 - flooding

Now knowing that adelta is formed by deposition of sediment at the mouth of a river by water fanning out and after sediments are deposited, they are gradually buried by more sediments, choose the best answer.


 

     a delta    