In a few generations, this population of beetles changed. Because:
The beetle population moved to a greener habitat.
Explanation:
The reason behind the answer is that adaptation as an evolution process will always make the best-suited survivors inherit the traits their parents had. Because those are the ones that allowed them to increase their chances to survive. Therefore, the morphology changes and the animals that have traits that match their environments will have more chances to survive than those that don't have traits that match their environment.
