In an ecosystem, there are two color varieties within a species of toads: brown and green. Over 50 years, the proportion of the population that is green increases from 20% to 50% percent. Which statement is the most likely to explain this change?
The environmental change such that green totes can blend into their surroundings better
Pollution caused a decrease in the proportion of brown toads
A disease caused a decrease in the proportion of brown toads
The environment changed such that toads that jump higher into the trees to survive better