Final answer:
Human-caused environmental changes that can lead to species' extinction include introducing invasive species and overhunting.
Step-by-step explanation:
The two sentences that describe human-caused environmental changes that would likely result in a species' extinction are C and D.
Sentence C describes introducing invasive species into an area where a native animal has no natural predators. This can disrupt the ecosystem balance and cause the extinction of the native species.
Sentence D describes overhunting a species to the point where there are not enough individuals left to naturally reproduce. This can lead to a decline in the population and eventual extinction.
Learn more about Human-caused environmental changes