Which of the following is an example of a colloid? MilkSaltwaterSand and waterVinegar

The example of a colloid among the options given is Milk.

Here's why:

1. A colloid is a mixture where tiny particles of one substance are dispersed, but not dissolved, throughout another substance.

2. Milk is a colloid of fat particles in water. The fat particles in milk are dispersed throughout a water-based solution, and they are too small to settle out.

3. Saltwater and vinegar are solutions, not colloids. In a solution, the solute (salt or acetic acid) is completely dissolved in the solvent (water), forming a homogeneous mixture.

4. Sand and water is a suspension, not a colloid. In a suspension, the particles are larger and will settle out over time.