You are presented with the quiz "What type of deposit fans out into the ocean?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adelta is formed by deposition of sediment at the mouth of a river by water fanning out" and "alluvial deposits can form deltas where the river flows into a lake or ocean". 

So, what's the best answer to the question?


 

      alluvial     