What is a depositional landform formed from sediment carried by a river as it enters the sea?

A delta is a depositional landform that forms at the mouth of a river where it meets a body of water, such as an ocean or a sea. As the river flows towards the sea, it loses energy and cannot carry all of the sediment it has transported. This sediment is deposited, leading to the formation of a delta. The shape of a delta is typically triangular or fan-like, resembling the Greek letter "delta," which is where it gets its name. This process results in the creation of new land, often characterized by rich, fertile soil and diverse ecosystems.

In contrast, an estuary is a partially enclosed coastal body of water where freshwater from rivers meets and mixes with saltwater from the sea. While estuaries play a crucial role in sediment transport and can also experience deposition, they are not the landforms primarily associated with sediment accumulation at the river mouth.

A basin generally refers to a depression in the earth's surface that can collect water or sediment but does not specifically describe a landform formed by river sediment at the ocean's edge.

An alluvial fan is a fan-shaped deposit formed where a river flows out of a narrow valley and onto a flatter plain, typically occurring on land. While it involves sediment deposition, it does