A certain species of frog comes in two different colors, green and brown. A population of these frogs live in and along a river. In 1980, a very large drought occurred, causing most of the river to dry up. Most of the plant life around the river died as well.Why did the green frog population decrease after the drought?

Answer:

The green frog population decreased because they lost their camouflage. Before the drought, they blended in with the green plants, but after the plants died and the river dried up, the environment became brown. This made it easier for predators to spot and eat the green frogs, while the brown frogs were better hidden.