**Explanation:**

Among the given options, the fuel whose usage has decreased the most compared to earlier is **Uple/wood**.

There are several reasons for this decrease in the usage of uple/wood as a fuel:

1. **Environmental concerns**: Burning uple/wood releases harmful pollutants and contributes to air pollution. As people become more aware of the negative impact of burning uple/wood on the environment and human health, they are shifting towards cleaner and more sustainable energy sources.

2. **Availability of alternatives**: With the advancement in technology and infrastructure development, people now have access to other cleaner and more convenient sources of energy. This has led to a decrease in the reliance on uple/wood as a fuel.

3. **Urbanization**: As more people move to urban areas, the demand for uple/wood as a fuel decreases. Urban areas usually have better access to electricity and cleaner cooking fuels like LPG, which are more convenient and efficient.

4. **Government initiatives**: Governments across the world have been promoting the use of cleaner energy sources and implementing policies to reduce the use of uple/wood as a fuel. This includes providing subsidies for cleaner fuels, promoting renewable energy sources, and raising awareness about the negative impacts of uple/wood burning.

5. **Health concerns**: Burning uple/wood for cooking and heating purposes can lead to indoor air pollution, which can have severe health effects, especially on women and children who are exposed to it for long durations. This has prompted people to switch to cleaner fuels that do not pose health risks.

Overall, the decrease in the usage of uple/wood as a fuel can be attributed to a combination of environmental awareness, availability of alternatives, urbanization, government initiatives, and health concerns.

Coal and wood as coal is got from wood and is cut to get coal. Therefore C and D