On the black-sand beaches of Hawaii exist clams with white, grey, and black phenotypes. It has been observed along these beaches that predatory birds target white clam shells over dark because they are more visible, If a population of larvae drift to another beach with white sand, what type of selection (directional, stabilizing, or disruptive) could occur and why? Using this scenario, how would you summarize the relationship between the environment, survivability, and an organism's potential fitness?