Answer:
d. Storms produce large waves that deposit sand bars along shorelines.
Explanation:
Large waves are the product of distant storms, which occur during the summer months. Such waves bring more gravel and sand to the shorelines than they carry. As a consequence, the coast is gradually being upgraded.
Along many shores it is possible to notice the occurrence of material deposition in one place and erosion in another. A good example is the south coast of England. In the Fairlight area, several meters of shoreline are carried off each year, and apparently a new bay is created in the area. Just a few miles further east, at Dungeness, the pebbles formed a cape shaped like a nose ("ness" in the name of the place means "nose"), which gradually erupted into the sea. Cape Canaveral, Florida, was similarly created.