Question

______ are formed as rivers slow down when they reach their mouth and empty into an ocean.

Multiple choice question.
a) Deltas
b) Point bars
c) Oxbow lakes
d) Meanders

Answer 1

Deltas are the landforms created at the mouth of a river where it slows down and deposits silt, sand, and mud into the ocean, forming a typically triangular-shaped section of land.

Step-by-step explanation:

Deltas are formed as rivers slow down when they reach their mouth and empty into an ocean. When a river reaches the ocean or a large lake, the water typically slows dramatically, and any silt in the river water will settle.

Rivers with high silt content discharging into oceans with minimal currents and wave action will build deltas, low-elevation areas of sand and mud, as the silt settles onto the ocean bottom. An often triangular-shaped section of land, deltas are formed as the waters of a river slow down and split into many channels as they deposit sand and silt that has been carried downriver.