**Wood is a fossil fuel - False**

**Explanation:**

**What is a fossil fuel?**

Fossil fuels are natural resources that are formed from the remains of organic materials over millions of years. These organic materials include plants, algae, and ancient microorganisms. The three main types of fossil fuels are coal, oil, and natural gas.

**Wood as a fuel:**

Wood, on the other hand, is not classified as a fossil fuel. It is considered a renewable source of energy because it comes from trees, which can be replanted and grown again. Wood is commonly used as a fuel for heating and cooking in many parts of the world.

**Differences between wood and fossil fuels:**

1. **Formation**: Fossil fuels are formed from the decomposition and transformation of organic matter over millions of years under high pressure and heat. Wood, on the other hand, comes directly from living trees and can be replenished through sustainable forestry practices.

2. **Carbon Cycle**: Fossil fuels release carbon dioxide into the atmosphere when burned, contributing to climate change. Wood, however, is considered carbon-neutral because the carbon dioxide released during combustion is offset by the carbon dioxide absorbed by trees during their growth.

3. **Availability**: Fossil fuels are finite resources and take millions of years to form. Once extracted and burned, they cannot be replaced within a human lifespan. Wood, on the other hand, can be sustainably harvested and replanted, making it a renewable resource.

4. **Energy Density**: Fossil fuels have a higher energy density compared to wood. This means that a smaller amount of fossil fuel can produce more energy than the same amount of wood.

**Conclusion:**

In conclusion, wood is not a fossil fuel. It is a renewable resource that comes from trees and can be replenished through sustainable practices. While wood can be used as a fuel, it differs from fossil fuels in terms of formation, impact on the environment, availability, and energy density.