D because of the size and how thick or thinner they are
Coastal erosion may be caused by hydraulic action, abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural. ... Also erosion commonly happens in areas where there are strong winds, loose sand, and soft rocks. The blowing of millions of sharp sand grains creates a sandblasting effect.p
locks. They raise ships to the water level of the differeny body of water that will be entered.
