What traits are used to classify organisms?

Color, size, extremities, where they live, how they move

Most of the determinations of how to classify were done by male scientists. Some female scientist did some other classification of some plants that were different from the typical male classification and that were very reasonable. So then there were two ways to classify. In one, these two are closest, but in the other those two are closest. Which shows us that classification of species is somewhat dependent on who does it. Don't ask my cat.