Answer:

Suspension

Explanation:

Suspensions. Simply defined as a heterogeneous mixture of two substances in which one is dispersed into the other, suspensions involve particles larger than those found in solutions, typically over 1,000 nm. ... Examples of suspensions include oil and water, dust or soot in air, sand and water and muddy wate

D. Suspension

Suspensions are mixtures containing particles that settle out when left undisturbed.