What is the difference between a heterogeneous mixture and a homogeneous mixture?

question 4 options:

a heterogeneous mixture is a pure substance and a homogeneous mixture is not.

a heterogeneous mixture has particles that are not uniformly distributed, but a homogeneous mixture has particles that are uniformly distributed.

a homogeneous mixture is a pure substance and a heterogeneous mixture is not.

a homogeneous mixture has particles that are not uniformly distributed, but a heterogeneous mixture has particles that are uniformly distributed.

A heterogeneous mixture has particles that are not uniformly distributed, but a homogeneous mixture has particles that are uniformly distributed.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.