Question

River deltas form…

Group of answer choices
by downcutting and headward erosion of sediment in the coastal plain.
on the alluvial plain at the base of a canyon.
where a stream empties into another body of water
where longshore currents redistribute river sediments at the mouth of the river.

Answer 1

i think its D

Step-by-step explanation:

river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment.

Hope it'll help ! :)