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

Monkey flowers near mines exhibit variations in traits, such as flower color and chemical composition, that allow them to thrive in contaminated soils. Those with adaptations that reduce toxic metal uptake or enhance survival in harsh conditions are more likely to reproduce and pass on their advantageous traits to the next generation. This process of natural selection leads to an evolutionary change in the population over time, demonstrating how environmental pressures can shape species. Thus, the observed adaptations in monkey flowers serve as a clear example of evolution driven by natural selection.