What kind of mixture is a solution

A simple solution is basically two substances that are evenly mixed together. One of them is called the solute and the other is the solvent. A solute is the substance to be dissolved (sugar). The solvent is the one doing the dissolving (water).

The answer is homogeneous.

The best description is homogeneous. The particles which are dissolved are invisible, which is why solutions, unlike colloids or suspensions, are always clear.