Solution:

• Brownian motion is the random, uncontrolled movement of particles in a fluid as they constantly collide with other molecules.
• This pattern of motion typically alternates random fluctuations in a particle’s position inside a fluid sub-domain with relocation to another sub-domain.
• Brownian motion of a particle is a result of the thermal motion of the molecular agitation of the liquid medium.
• Much stronger random displacement of a particle is usually observed in a less viscous liquid, smaller particle size, and higher temperature.