In an ecosystem, there are two color varieties within a species of toads, brown and green, over 50 years. The population of the population that is green increases from 20% to 50% which statement is most likely to explain this change.

One possible explanation for the increase in the population of green toads could be natural selection favoring the green coloration in the environment. This could be due to certain advantages that green toads have over brown toads in terms of camouflage, predator avoidance, or reproductive success. As a result, green toads may have higher survival and reproductive rates, leading to an increase in their population over time.