In order to preserve their beaches, cities located along a coast will often build groins that protrude into the sea. What is the result of this process?
A) Sediment is deposited on the side of the groin facing into the current, and this results in deposition in the desired location.
B) More sediment is made available to areas downshore, so they also benefit from this engineering process.
C) Less sediment is available to areas downshore, so their beaches begin to erode.
D) both A and B
E) both A and C

Question

Quizplus · Accepted Answer

While groins can help to trap sediment on the side facing into the current, they also disrupt the natural flow of sediment along the coast. This can lead to less sediment being available to areas downshore, causing their beaches to erode. Therefore, both options A and C are correct.

In Order to Preserve Their Beaches, Cities Located Along a Coast