Imagine this hypothetical case: when mate preference trait was set to hyper you did indeed observe that the average activity level of the population of swimbots increased through time due to sexual selection. Great, this is expected. However, much to your surprise, you also found that after 2 hours almost all of the swimbots were the same color (say, green, for example). Your task is to explain the fact that a population initialized with swimbots of many different colors ended up with mostly green swimbots when similar color wasnt the trait that mates preferred! How did that happen? It is important to note that color does not play a role in procuring food, nor does it play a role in finding a mate when hyper is the trait under sexual selection. Thus, color is not affected directly by natural selection or sexual selection in this case. And yet you clearly observed that the diversity in swimbot color decreased through time (i.e., although the starting population had many different colors represented, most of the swimbots were green after two hours). What could explain this decrease in variation in color?