Question

which is a characteristic of colloids? are homogeneous mixtures have large dispersed particles will settle out over time are made up of at least two substances

Explanation:

A colloid is a heterogeneous mixture made up of at least two substances - a dispersed phase and a dispersion medium. Colloidal particles are intermediate in size, do not settle out over time like in suspensions, and the mixture is not homogeneous like a solution.

Answer:

are made up of at least two substances