At first there were very small animals and insects in deep dense forests and there had hardly been any evolution
Soon after several generations came and went, animals began to grow to the dense forests and soon there were monkeys swinging around on branches. At first there were monkeys swinging around and living their life. There was soon families. There were moms an dads and they soon had children.
But as natural selection occurs the monkeys were actually not that fast or nimble when it came to escaping predators. So one day, while mom dad and their two little ones were looking for food, a predator looking to fill his tummy when he spot them with his keen eye sight.
After the predator spotted his potential next dinner, he began stalking the family, after waiting for the right moment and keen sight the predator pranced on the monkey family and sadly ate mom and dad as well as one of their children.
But the other child was able to escape for he had a genetic mutation that allowed him to be more nimble and quick so he could climb up the trees much faster with very little noise as well.
Because of his survival the child had to grow up very quickly and learn how to survive on his own. Until one day when the child was now a grown monkey he met a female monkey and they were attracted to each other, thus leading to their two new baby girls that also are very quick to climb trees and survive.