Sal forests of West Bengal were restored in 1980s by
local people and government's forest department
The correct option is B.
Explanation of the correct option
Explanation of the incorrect options
Option A
Rain provides water for the irrigation of plants and trees. It helped the trees grow that were protected and planted by locals and the government's forest department.
Option C
The government alone could not save the Sal forests due to the lack of knowledge regarding forest management.
Option D
Of the given choices, one is correct. Thus, this option is incorrect.
Local people and the government's forest department worked together to restore the Sal forests of West Bengal.