Answer:
D.) Speciation
Explanation:
A.) is incorrect because favorable traits becoming more widespread within a population usually means that the population is becoming better suited for its environment. Therefore, unless there are external factors, starvation is not a direct result of positive adaptations.
B.) is incorrect because the population is gaining adaptations that make their survival within an environment more likely, not less likely. Again, extinction is the opposite of what occurs when this happens.
C.) is incorrect because migration typically occurs when a population is experiencing hardships within their environment. This is what causes them to move somewhere else in order to increase their survival/reproductive success. As stated previously, favorable adaptations would make the population better suited for their current environment. These changes would discourage migration.
D.) is correct because speciation occurs when a population changes so much over generations to the point in which they become another species entirely. If a population undergoes numerous positive adaptations, they will become more and more fit for their environment. This newfound fitness and these changes may be so drastic that the population becomes too different to classify them the same way they once were.
