The movement of the molecules of the dispersion medium under the influence of an electric field and not allowing the colloidal particles to move is called………..

Explanation

To solve the question, we need to understand the concepts related to colloidal systems and the behavior of dispersion mediums under electric fields.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Dispersion Medium**: This is the continuous phase in which colloidal particles are dispersed. It can be a liquid or gas.
- **Colloidal Particles**: These are the small particles that are dispersed in the dispersion medium.

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