Most notable changes
We can see en species like the elephant that don having their tusk reduces the chances of being hunted by a lot so those are the ones that are capable to surviving and reproducing
In the mice, we can see how the ones that are immune to poison are the ones that can reproduce passing that mutation to their sons
And how some frogs are hunted because of their medicinal properties so they start producing poison
Possible solutions
Theres only one possible solution, it its to stop hunteing this species and stop destoeying their habitats
this can also be archived by createing natural reservs