What is the "coagulation" process?

Explanation

### Step-by-Step Solution:

1. **Definition of Coagulation**: Coagulation is a process that occurs in colloidal solutions where fine particles (dispersed phase) aggregate and settle down, leading to the formation of a precipitate.

2. **Understanding Colloidal Solutions**: A colloidal solution is a heterogeneous mixture consisting of very fine particles dispersed in a medium (dispersion medium). The particles in a colloid are typically too small to be seen with the naked eye but are large enough to scatter light.

3. **Charge on Colloidal Particles**: Colloidal particles usually carry a charge, which plays a crucial role in maintaining the stability of the colloidal solution. This charge prevents the particles from coming too close to each other, thus keeping them dispersed.

...