In which form is petroleum present in nature?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Petroleum**: Petroleum is a type of fossil fuel that is formed from the remains of dead plants and animals that have been subjected to heat and pressure over millions of years.

2. **Location of Petroleum**: It is typically found in geological formations beneath the Earth's crust. These formations can be located in various places around the world, often in sedimentary rock layers.

3. **Extraction of Petroleum**: When petroleum is extracted from the ground, it is in a raw, unrefined state. This raw form of petroleum is commonly referred to as "crude oil."

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