The exhausted forest cover can be regained by
Planting more trees
The correct option is C.
Explanation of correct option:
Explanation of incorrect options:
Option A:
By keeping a check on the floods, we can prevent soil erosion.
Option B:
The usage of forests and their products is not completely avoidable but can be used wisely to prevent over-usage.
Option D:
By cutting the trees, the area under the forest decreases, thus leading to deforestation.
Final answer: The exhausted forest cover can be regained by planting more trees.