Using two or three sentences, describe the role of waves in shaping earth's coastlines.

Waves are the busiest sculptors on the coastline. Built up by winds far out at sea, they unleash their energy and go to work when they break on the shore. Along much of the coastline, pounding waves slowly chip away the base of cliffs, forcing chunks of rock to crumble and slide into the sea.

(Paraphrase)

answer biscay bay;