Which of the following is NOT used as a strategy for sustainable development?

Use of thermal power

The correct answer is Option 2: Use of thermal power

Explanation: Thermal power, which often relies on burning fossil fuels like coal, oil, or natural gas, is not considered a strategy for sustainable development because it contributes to pollution and greenhouse gas emissions.

In contrast, solar power, hydel (hydroelectric) power, and biogas are renewable energy sources that align with sustainable development goalss.