Answer and Explanation:
Erosion is a natural process that occurs worldwide, and the erosion of beaches is the most common type. Although it is natural, there can be many ways to prevent it or to reduce its levels and avoid the loss of protection near coastlines.
People can help prevent erosion to the coastline by limiting (or not supporting) the construction of seawalls and sandbags that lead to beach erosion. Moreover, communities should protect NATURAL sand dunes, as they protect the coastlines from erosion. I put emphasis on natural because man-made sand dunes do the opposite. It is important to consider that beneficial (natural) sand dunes are made of layers of different types of sand, which enables the wind to gather sand in a specific spot instead of reducing it, while also allowing vegetation to grow deeper and protect the coastline.