The correct answer is option D
Mangrove forests are traditionally been viewed as unhealthy, wastelands and unproductive.
Earlier mangroves were considered as a waste for the environment and had no ecological value.
They were a messy plant with no use that was present along the coast. They were considered unhealthy as it was not useful.
Now a days mangroves are considered useful as it improves the water quality and serves as a breeding place for fishes that helps the fisherman economically.
