How do industrial melanism, insecticide resistance, and antibiotic resistance all support the idea of evolution and natural selection?

Industrial melanism is the resultant effect of industrial pollution on arthropods. The individuals that had a darker pigmentation were more fit to the new environment, more polluted that caused darkened buildings and trees, and were thus favoured by natural selection to survive.

Insecticide resistance and antibiotic resistance is also a manifestation of the emergence of new groups of organisms that are resistant to a specific attack out of an existing population, and are therefore favoured by selection to survive over the others.