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%. Which statement is most likely to explain this change?

Question

1. Pollution cause a decrease in the proportion of brown totes
2. The environment change such that totes can jump higher into the trees to survive better
3. The environment change such that green toads can blend into their surroundings better
4. It is East Coast decrease in the proportion of brown toads

Answer 1

3. The environment changed such that green toads can blend into their surroundings better.