Aheterogeneous mixture is a
a. mixture in which its components can't be separated.
b. component added to sand that makes it inseparable.
c. mixture in which its components retain their identity.
d. mixture that always contains water.

A heterogeneous mixture is a mixture in which its components retain their identity. Why: Heterogeneous mixtures have several parts which can't be separated, like an italian dressing. Therefore, it's prefix is (hetero), which means something along the lines of "different". In a homogeneous mixture, it can be separated, and the prefix (homo) means "same".