_______ materials are made by modifying raw materials such as coal and petroleum through chemical reactions to obtain new materials

Options

A. Man made
B. Artificial
C. Natural
D. Both A and b

Answer

The answer to the question is "Synthetic" materials.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a type of materials that are created by altering raw materials through chemical processes.

2. **Identifying Raw Materials**: The raw materials mentioned are coal and petroleum. These are natural resources that can be transformed into various products.

3. **Chemical Reactions**: The process of modifying these raw materials involves chemical reactions. This means that the original substances undergo changes at the molecular level to form new substances.

4. **Definition of Synthetic Materials**: Materials that are created through the modification of natural resources (like coal and petroleum) using chemical processes are referred to as synthetic materials.

5. **Final Answer**: Therefore, the blank in the question can be filled with the word "Synthetic".

### Final Answer: Synthetic materials are made by modifying raw materials such as coal and petroleum through chemical reactions to obtain new materials.

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