Useful substances obtained from petroleum and natural gases are called:

Options

A. chemicals
B. petroleum products
C. petrochemicals
D. none of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of useful substances obtained from petroleum and natural gases.

2. **Identifying the Resources**: Petroleum and natural gas are both natural resources that take millions of years to form. They are classified as non-renewable sources of energy because they can be depleted.

3. **Refining Process**: Petroleum undergoes a refining process, which separates it into various useful products. This process is essential for converting crude oil into usable forms.

4. **Types of Products**: The products obtained from the refining of petroleum and natural gas can be categorized into different types, including fuels, lubricants, and raw materials for various chemicals.

5. **Correct Terminology**: The useful substances derived from petroleum and natural gas are specifically referred to as "petrochemicals". Petrochemicals are the chemical products derived from petroleum and natural gas, and they serve as the building blocks for a wide range of materials.

6. **Applications of Petrochemicals**: Petrochemicals are utilized in various industries, including the production of plastics, synthetic fibers, cosmetics, and even in renewable energy technologies like solar panels and wind turbines.

7. **Conclusion**: Therefore, the correct answer to the question is that useful substances obtained from petroleum and natural gases are called "petrochemicals".

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