Complex sentence: Adaptive melanism can lead to the creation of morphs, the most notable example being the peppered moth whose evolutionary history in the United Kingdom is offered as a classic instructional tool for teaching the principles of natural selection.
Split into simpler sentences: Adaptive melanism can lead to the creation of morphs, the most notable example being the peppered moth. The history of this phenomenon in the peppered moth in the United Kingdom is a classic instructional tool for teaching the principles of natural selection.