* Solution: A solution is a homogeneous mixture where one substance (the solute) dissolves completely into another (the solvent). The result is a single phase (like salt dissolved in water).

* Suspension: A suspension is a heterogeneous mixture where particles of one substance are dispersed throughout another but don't dissolve. The particles are visible and will settle over time (like sand in water).

Milka mixture contains chocolate powder, milk powder, and sugar. These ingredients don't completely dissolve in water, forming a visible mixture that will settle over time. This makes it a suspension.