Which of these does not prevent growth of bacteria?

Options

A. Salt
B. Oil
C. Sugar
D. Water

Explanation

To determine which option does not prevent the growth of bacteria, we can analyze each option provided:

1. **Salt**: Salt is commonly used as a preservative. It draws moisture out of food and creates an environment that is inhospitable for bacteria, thus preventing their growth.

2. **Oil**: Oil is also used in food preservation. It creates a barrier that can limit the exposure of food to air, which helps to prevent bacterial growth.

3. **Sugar**: Sugar can act as a preservative as well. It works by drawing moisture out of food, similar to salt, and is often used in jams and jellies to inhibit bacterial growth.

4. **Water**: Water is essential for the growth of bacteria. It provides the necessary environment for bacteria to thrive and reproduce. Therefore, it does not prevent bacterial growth.

Based on this analysis, the option that does not prevent the growth of bacteria is **water**.

### Step-by-Step Solution:
1. **Analyze each option**: Look at how each substance interacts with bacteria.
2. **Identify preservatives**: Recognize which substances are known to inhibit bacterial growth.
3. **Determine the role of water**: Understand that water is necessary for bacterial growth.
4. **Conclude**: Identify that among the options, water does not prevent bacterial growth.