Give reasons for each of the following:
Coal, petroleum and natural gas are called fossil fuels.

Explanation

To answer the question "Give reasons for each of the following: Coal, petroleum, and natural gas are called fossil fuels," we can break it down into a step-by-step explanation.

### Step-by-Step Solution:

1. **Definition of Fossil Fuels**:
- Fossil fuels are defined as natural substances that are formed from the decomposed remains of ancient plants and animals. This process takes place over millions of years under specific geological conditions.

2. **Formation Process**:
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