Correct Answer: Rural areas

Solution : The correct answer is (C) Rural areas

Non-commercial energy sources are often used in rural areas. These sources include traditional fuels like firewood, agricultural residues, and animal waste, which are typically used for cooking, heating, and basic energy needs in rural households. Non-commercial energy sources are more prevalent in rural areas where access to commercial energy sources may be limited or expensive. In contrast, urban areas and high-income households are more likely to have access to commercial energy sources for their energy needs.