Respuesta :
The fuel sources commonly used in less developed countries is wood.
What is fuel?
- "A fuel is any material that can be made to react with other substances so that it receives energy as thermal energy or to be used for work."
- A good fuel should have high calorific value.
- The fuel that is easily available and cheaper is used by large populations.
What do you mean by less developed countries?
- "Less developed countries has low per capita income and widespread poverty."
- They use resources that can be easily accessible and cheaper.
Hence, the correct option is C. wood.
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