Question

part a
what is the difference between a homogeneous - mixture and a heterogeneous mixture?
a heterogeneous mixture has two or more distinct regions that have different compositions. a homogeneous mixture has only one region and the composition of the mixture may change
a homogeneous mixture has two or more distinct regions that have different compositions. a heterogeneous mixture has only one region and the composition of the mixture does not change.
a heterogeneous mixture has two or more distinct regions that have different compositions. a homogeneous mixture has only one region and the composition of the mixture does not change.

Explanation:

A heterogeneous mixture has two or more distinct regions with different compositions. A homogeneous mixture has only one region and its composition does not change.

Answer:

A heterogeneous mixture has two or more distinct regions that have different compositions. A homogeneous mixture has only one region and the composition of the mixture does not change.