In this forest there are multiple variations among the two rabbit breeds. There is a light brown breed and a dark brown breed. The dark brown rabbits blend in better to the environment and are more athletic compared to the light brown breed.
The darker colour rabbits are faster and hard to see, therefore are less likely to be caught by predators. The light brown rabbits do not blend into the environment, so they are easier to see as well as being slower than the brown rabbits.
A new animal is introduced to the forest. This animal is a predator, a fox. This causes rabbits to run away from the predator since they are alarmed by the predator. They are competing for survival.
Most lighter coloured rabbits got eaten since they are fatter making them more appetizing to the fox. They are easier to be seen, so the fox was able to catch them easily. The darker rabbits were the exact opposite of the light ones, so they survived.
Since the darker rabbits survived better, there were more of them alive. They can now reproduce and become more common since they passed down their genes to their offspring, creating more better adapted, dark brown rabbits, than light ones.
Eventually only dark brown rabbits survive in the forest since they are the best adapted to the environment. The good traits are now passed down to their offspring, showing natural selection.
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