The traditional view of mangrove forests as wastelands and unhealthy environments promote their degradation because
a.
mangrove forests are unproductive, unhealthy habitats
b.
people did not feel it was necessary to preserve them
c.
mangrove forests do not need to be preserved
d.
all of the above

The correct answer is - c. mangrove forests do not need to be preserved.

People didn't really felt that mangrove forests had to be preserved, and saw them more like a burden that should be removed. This is due to the fact that people don't really have any use of this type of forests, and also they occupy places that people want and can use them much better for their own purposes. Because of this people also were not seeing the ecological importance of this forests and that they are a key element in their respective environment and that their destruction will have a chain reaction and affect the whole ecosystem in that region and leed to dying out or endangering thousands of animals and plants.

landlessness of ordinary people

^^something like that^^^