Question

multiple - choice question
deltas can be found...
in the ocean
at the mouth of rivers
areas where earth surface is thin
rewatch

Explanation:

A delta is a landform that forms at the mouth of a river. As a river flows towards its mouth (where it meets a larger body of water like a sea or ocean), it slows down. When the river slows, it can no longer carry all the sediment it was transporting. The sediment is then deposited, gradually building up the delta landform over time. Oceans are large bodies of water and deltas are not found within the open ocean. Areas where the earth's surface is thin are more related to geological features like rift zones or areas prone to volcanic activity rather than delta formation.

Answer:

At the mouth of rivers