Coexisting species of wild cats differ in the size of their canine teeth, which corresponds to differences in their preferred species of prey. this outcome is most likely the result of:

Microevolution.

The wild cats' teeth being tuned to the prey they hunt appears to be the result of microevolution - where they adapt to their environment & such.

I hope this helped. Please let me know if there are any errors.

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.