Petroleum is extracted by _______ in the earths crust where the survey predicts presence of oil.

Explanation

To answer the question "Petroleum is extracted by _______ in the earth's crust where the survey predicts the presence of oil," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Petroleum**:
- Petroleum, also known as crude oil, is a natural resource found deep within the Earth's crust. It is often trapped in rock formations.

2. **Extraction Method**:
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