Which of the following statements is true regarding the effect of Brownian motion on colloidal stability?
It promotes coagulation of colloidal particles.
It increases the size of colloidal particles over time.
It prevents the settling of colloidal particles.
It decreases the viscosity of colloidal systems.
Brownian motion leads to the continuous random movement of colloidal particles in the fluid medium, preventing them from settling due to gravity.