How do monkey flowers near mines show that natural selection causes evolution?

I think it's A

Explanation: Development of cold fronts

Weather phenomenonPrior to the passing of the front

Precipitation/conditions*Light patchy rain can be produced by stratocumulus or stratus in the warm sector. In summer, sometimes thunderstorms if a preceding squall line is present. In winter snow squalls or showers may occur.

Hope this helps :D