One of the big problems is that evolution has been poorly taught to lay people. How many of you remember the story of the white and gray moths in London? When London got real smoggy and dirty, the white moths stood out from the environment and became easy prey. The gray moths were better camouflaged and pretty soon almost all the moths were gray.
This was touted as proof of evolution when I went to school. It is nothing of the sort. It is natural selection, but nothing evolved. The gray was already there. If the Vikings raided Ireland and kidnapped all the blondes and brunettes and left only the red-heads, red hair would dominate in Ireland.
Good grief you need to start with a dictionary. Natural selection is one of the mechanisms of evolution.