What caused natural selection among the peppered moths of Manchester, England?
natural environmental changes
human-caused environmental changes
genetic stability in the population
resource stability in the population

Human-caused environmental changes

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

i think this picture will you.