It's debatable, really. but, it is said that the earth was created by "the big bang theory" which is when a huge explosion occurred over 12 billion years ago. humans are said to be created through the process of evolution. started as apes 5 million years ago, and over time the apes improved by natural selection, and boom, here we are :)
Explanation: Because if the mountain lions, coyotes, and bobcats decrease they arent enough to prey on the deer which causes the deer population to be able to reproduce over time.