In a few generations, this population of beetles changed. A group of bugs includes 13 black bugs and 4 green bugs. After a few generations, there are 13 green bugs and 4 black bugs. Which is the most likely explanation for the change? The beetle population moved to a greener habitat. A natural disaster almost caused the extinction of the population. The beetle population's food sources decreased dramatically. A mutation resulted in a new color of insect. In a population of seals, most of the seals have similar coloring. However, one seal has albinism. This seal is white and is almost completely blind. What is most likely the cause of this difference from the rest of the population? gene flow natural selection gene mutation genetic drift