In ancient times people classified plants and animals by use.

One of the ways that people of ancient times classified plants and animals is by use. Today, group the creatures, as they do the plants, on the premise of shared physical attributes. They put them in a progressive system of groupings, starting with the kingdom Animalia and continuing through phyla, classes, orders, families, genera and species.

Explanation:

the answer is c.) there is a warm front in region a and a stationary front in region b.