Question

which of the models is an example of a solution?

Explanation:

A solution is a homogeneous mixture where one substance is dissolved in another. The first image shows a heterogeneous mixture with undissolved particles. The second shows two - layer immiscible liquids (a heterogeneous mixture). The third image shows a uniform - colored liquid which is characteristic of a homogeneous solution.

Answer:

The third model (the red - colored uniform liquid in the beaker) is an example of a solution.