Answer:
Erosion
Explanation:
When grass is removed on the beach sand dunes that will mean that the sand will be exposed to agents of erosion such as wind and rain.
More sand will be washed away which may even disrupt the ecosystem as loss of habitat may result from this removal of grass.
Grass is useful in holding together the sand and protecting it from being vulnerable to erosion and preventing the flooding of too much sand into the ocean which may affect some animals that live on the shore .