What does the industrial melanism as observed in the peppered moth prove?

The dark melanic form of the moth has no selective advantage over lighter form in industrial area. The lighter-form moth has no selective advantage either in polluted industrial area or non polluted area Melanism is pollution generated feature The true black melanic forms escaped unnoticed so they managed to survive resulting in more population of black moths.

The true black melanic forms escaped unnoticed so they managed to survive resulting in more population of black moths.

The true black melanic forms escaped unnoticed so they managed to survive resulting in more population of black moths.