Respuesta :
The answer would be D, the reason why is that if you build something on sand, the sand itself will become weaker because of the weight, so waves will be able to cause more erosion on the sand.
The correct answer is building sand structures on the sand dunes.
The erosion of upper layer of the sand near the beach is called as beach erosion. There are many reasons for beach erosion by natural sources, but human activities increases beach erosion by building structures on the sand dunes that are carried away by wind. This carrying away of the sand results in the beach erosion.
