Final answer:
Coevolution is when two species evolve together in response to each other. One example is the relationship between Mexican acacia trees and their attendant acacia ants.
Step-by-step explanation:
Coevolution is when two species evolve together in response to each other. One example of coevolution is between Mexican acacia trees and their attendant acacia ants.
The trees provide shelter and food for the ants, while the ants protect the trees from herbivores and potential pathogens.
Another example of coevolution is between flowering plants and their pollinators, where the flowers have evolved structures and traits that attract specific insects for pollination.