I'm guessing but it seems that splitting would use the most energy. Don't take this as a correct answer!
I assume the question is referring to peppered moths in which case
The black species of peppered moths which previously stood out against the white tree bark will now blend in because of the layer of soot covering the trees, causing their numbers to rise. Furthermore the white moths which used to blend in will now be chosen against and their populations will fall.
Answer:
the involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements that push the contents of the canal forward.
Answer: It would unbalance the ecosystem.
Due to the fact that if some species die off, the other species that rely on those species for food or protection would loose that food/ protection which may lead to their extinction and their extinction would lead to another extinction and so on.
