It is compulsory for ______ to replant the trees they have cut.
The correct answer is Option A.
Option B: CITIZENS is incorrect. As given in the passage, the duty of citizens is to protect the environment.
Option C: THE GOVERNMENT is incorrect because in the passage it is no where mentioned that the government has to replant trees.
Option D: ENVIRONMENTALISTS protect the environment. They are not to replant trees according to the passage.
Hence these options are incorrect.
Option A:BUILDERS is the correct answer as it is clearly mentioned in the passage they should replant tress to compensate for the cutting of tress for building purposes.
Hence Option A is the correct answer.