Question

Which is a heterogeneous mixture? the water, vinegar, and dye mixture used to make colored eggs the mixture of gases in the air used to inflate a flattened bicycle tire concrete in which you can see the sand and mortar that make up the mixture

Answer 1

the last choice is a heterogeneous mixture

Answer 2

A heterogeneous mixture composes of non- uniform components, so the concrete would be the answer, because you can tell the components from one another.