well you could google it or if the population changes then there would be less prey if it increases but if it decreases then it would be more prey and less predators.
Explanation:
Moving closer to the backyard I notice that there is a rock and if it has many lumps on it because of the sun then it may also be because the tree must have blocked the sunlight. You can tell if the object living or nonliving by the way it reacts to either the chemicals or the rock it is on.
Explanation: