What type of mixture scatters light and cannot be filtered easily?

A colloid scatters light because it contains particles large enough to scatter a beam, but those particles are small enough that they cannot be separated easily by ordinary filtration. Colloids are classified as heterogeneous mixtures because their dispersed particles and the surrounding medium are distinct, even if the mixture may look uniform. Therefore, the correct choice is “a colloid, a heterogeneous mixture.”

AI-written and checked against the verified answer.