The picture shows Poecilia reticulata, a type of guppy fish, found in a large variety of tropical environments. In some locations, populations of these fish have evolved over generations to become less vibrant in color and less spotted. What is the most likely cause of this variation?
A
ecological succession, where individual guppy fish had less vibrant colors and formed a new population

B
artificial selection, where individual guppy fish were attracted to, and reproduced with less vibrant guppy fish

C
natural selection, where the less vibrant guppy fish avoided predators and passed on the genes to their offspring

D
reproductive isolation, where the population of less vibrant guppy fish only reproduced with individuals in one location