The correct option is
D Using alternate energy sources
Fuelwood or firewood is a renewable conventional resource used for cooking and heating in villages, remote areas, crematoria, etc. More than 2 billion persons use wood as fuel. In India, the annual consumption of firewood is around 300 million per cubic meter with natural availability being only 60 million per cubic meter.
To overcome the shortage and fulfill the demand, excessive trees are cut down leading to deforestation.
Fuelwood crisis can be resolved by using alternate or non-conventional sources of energy like solar, wind, tidal, or biogas energy.
So, the correct answer is option D.