To solve the problem, we need to classify the type of fuels to which coal, petroleum (oil), and natural gas belong.
1. Understanding Fossil Fuels:
Fossil fuels are formed from the remains of dead plants and animals that were buried under the Earth's surface millions of years ago. These organic materials underwent decomposition under high pressure and temperature to form:
- Coal (from plant material)
- Petroleum (crude oil)
- Natural gas
2. Elimination of Other Options:
- Chemical fuels: A vague term not specific to natural sources like coal or petroleum.
- Sunlight: A renewable source, not a fuel itself.
- Water: Not a fuel but a by-product in many combustion reactions.
Final Answer:
Coal, Petroleum (oil), and Natural Gas belong to $ \text{Fossil fuels} $