What might be an example of coevolution? 

A)  plants and herbivores 
B)  plants and water 
C)  plants and wind 
D)  plants and soil nutrients

Coevolution is the process where two species influence each other's evolution over time. The best example of coevolution is between plants and herbivores, as plants have evolved strategies to deter herbivores, and herbivores have evolved ways to overcome these defenses. This has led to a continuous "arms race" between plants and herbivores, with each species evolving in response to selection pressures from the other.