The fox has dug a hole, to be able to sneakily see other animals to hunt them. This is a good adaption also is other animals try to eat the fox
The squirrel sees the fox because of its color, that means the fox can't eat the squirrel and will die because of it.
The fox had reproduced and the babies have adapted to their surrounding, therefore they can eat and the squirrels can't see them.
Hey, didn't see you there you are a different color than your dad.
That's right, adaption is key in the natural world.
That's the point its called adaption, a change in order to fit your environment. My dad was too bright therefore he died because he couldn't catch food.
In order to live this fox had to adapt and change color, which means this fox's parents had some sort of color change, therefore, this fox had a better chance of survival. So, in this case, the fox with the right color lives and the fox with the wrong color dies.