Correct Answer: Cooking and heating

Solution : The correct answer is (C) cooking and heating.

Non-commercial energy sources refer to traditional and often locally available sources of energy that are used primarily for household purposes in rural and low-income areas. These sources include biomass fuels such as firewood, agricultural residues, and animal dung, which are commonly used for cooking and providing heat in households. They are typically used in traditional stoves or open fires, especially in regions where access to commercial energy sources may be limited or unaffordable. Non-commercial energy sources are also used for small-scale localized electricity generation in some cases, but their primary usage is for cooking and heating needs.