What is the name of a mixture in which particles can be seen and easily separated by settling or filtration?

The correct choice describes a suspension, which is a type of mixture where solid particles are dispersed throughout a liquid. In a suspension, the particles are large enough that they do not dissolve and, over time, can settle to the bottom of the container due to gravity. This characteristic allows for the particles to be seen and separated using techniques such as settling or filtration.

In contrast, a solution is a homogeneous mixture where the solute is completely dissolved in the solvent, making the individual particles too small to be seen or separated via filtration. A mixture, in general, refers to any combination of substances, but it does not specify the nature of the distribution or separation of particles. An emulsion is a specific type of mixture involving the combination of two immiscible liquids, where one liquid is dispersed in the other, but it typically requires an emulsifying agent to prevent separation.

Understanding these differences is crucial in fields like esthetics, where knowledge of mixtures and their properties can affect treatment applications and product formulations.