The two sources of energy that would mostly lead to pollution in the community are

Analyze the question: We are asked to pick the two energy sources that cause the most pollution in a community. So we need to separate clean (renewable) sources from polluting (fossil fuel) sources.

Explain the concept:

• Renewable, clean sources: solar and wind. They give off no smoke or harmful gases when producing energy.
• Fossil fuels: coal, kerosene, petrol, diesel, and natural gas. Burning them releases carbon dioxide (CO₂), carbon monoxide (CO), sulphur dioxide (SO₂), nitrogen oxides and soot. These cause air pollution, acid rain, respiratory problems, and global warming.

Step-by-step solution:

• A. Solar and kerosene: solar is clean, so this pair is only half polluting. ✗
• B. Coal and wind: wind is clean, so this pair is only half polluting. ✗
• C. Kerosene and coal: both are fossil fuels that release smoke and toxic gases when burned. ✓
• D. Solar and wind: both are clean. ✗

Answer: Option C. Both kerosene and coal are fossil fuels, so together they contribute the most pollution.

Exam tip: In energy-and-pollution questions, ask whether the source burns something. If it burns (coal, kerosene, firewood, petrol), it pollutes. If it uses sunlight, wind, or water, it is clean. Choose the option where both items are in the "burning" group.