Question

1. what typically happens to beaches on the opposite side of a groin?

a. they accrete sand
b. they erode
c. they remain unchanged
d. they become rocky

Explanation:

A groin is a shore protection structure. It traps sand on the updrift side (the side from which the long - shore current is coming). On the downdrift side (the opposite side), since the sand supply is blocked by the groin, the beach loses sand. Erosion occurs as the natural sediment transport is disrupted.

Answer:

B. They erode