Answer:
The statement is incorrect.
Succession is a gradual and predictable change in the species composition of an ecosystem over time, starting from bare rock or sand and ending in a stable, self-sustaining community called a climax community.
In the scenario described, the deposition of new sand and the formation of new dunes can provide new habitats for pioneer species, which are the first to colonize disturbed areas. These species are usually opportunistic and fast-growing, such as grasses and shrubs. Over time, as these species die and decompose, they contribute to the formation of soil, which allows for the establishment of other species, such as trees and woody plants.
However, since the scenario involves a coastal region, the newly formed sand dunes can be highly vulnerable to erosion and flooding, which can interrupt the successional process and prevent the establishment of a climax community. In addition, the deposition of new sand can also affect the chemical and physical properties of the soil, which can limit the growth of certain plant species and affect the food web of the ecosystem. Therefore, it is not certain that the region will undergo succession to become a climax community.