__________ is a conventional source of energy.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Coal
Coal is a fossil fuel. Fossil fuels are conventional sources of energy, while tidal, solar and geothermal energy are non-conventional.
NCERT (2026-27): “Mineral fuels are essential for generation of power, required by agriculture, industry, transport and other sectors of the economy. Mineral fuels like coal, petroleum and natural gas (known as fossil fuels), nuclear energy minerals, are the conventional sources of energy. These conventional sources are exhaustible resources.” |