Name the substance that added products to prevent from microbial growth.

Options

A. Diazotrophs
B. Pathogens
C. Pasteurization
D. Preservatives

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a substance that is added to products to prevent microbial growth.

2. **Identifying the Options**: The options provided are:
- A) Di-azotrop
- B) Pathogen
- C) Pasteurization
- D) Preservative

3. **Analyzing Each Option**:
- **Di-azotrop**: This is not a commonly known substance related to food preservation.
- **Pathogen**: This refers to microorganisms that can cause disease, not a substance used to prevent them.
- **Pasteurization**: This is a process of heating food to kill harmful microorganisms, but it is not a substance added to food.
- **Preservative**: This is a substance added to food to prevent microbial growth and spoilage.

4. **Choosing the Correct Answer**: Based on the analysis, the correct answer is **D) Preservative**. Preservatives are substances that are added to food products to inhibit the growth of microorganisms, thereby extending the shelf life of the food.

5. **Example of Preservatives**: Common examples include:
- Sugar in jams and jellies
- Vinegar or oil in pickles

**Final Answer**: The substance that is added to products to prevent microbial growth is called a **preservative**.

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