Question

1. choose the best answer.

a —— is a plain formed as sediments are deposited at the mouth of a river.
glacier
mountain
delta
wedge

Explanation:

A delta is a landform that forms at the mouth of a river where the river deposits sediment as it flows into a body of water (such as a sea, lake, or ocean). A wedge is a geometric shape or a geological structure like a fault - related wedge. A mountain is a large landform that rises prominently above its surroundings. A glacier is a large mass of ice that moves slowly over land.

Answer:

delta