Fuels that have been formed from dead remains of plants and animals are called _______.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of fuels that are formed from the dead remains of plants and animals.

2. **Identifying the Type of Fuel**: Fuels that originate from the decomposition of ancient organic matter (plants and animals) are known as fossil fuels.

3. **Defining Fossil Fuels**: Fossil fuels are formed through the natural processes of decomposition under specific conditions. This includes being buried under layers of sediment, subjected to heat and pressure over millions of years.

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