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

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

The last choice is a heterogeneous mixture

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.