What was the explanation for the increase in dark-winged moths after industrialization?

Step-by-step solution

The increase in dark-winged moths was explained by predators being better able to spot white-winged moths against the darkened tree trunks, leading to higher survival rates for the dark-winged moths .During post- industrialisation period, the tree trunks became dark due to industrial smoke and soots. Under this condition the white-winged moth did not survive due to predators, dark-winged or melanised moth survived. Before industrialisation set in, thick growth of almost white-coloured lichen covered the trees - in