There is a population of wolves living in the mountains by and an a lake
There is a flood that separates the wolves. Some stay up in the mountains while others stay in the lower parts by the water
Some Wolves have thicker fur and longer tails than others that make them more suitable for their habitat by the lake
Geographic Isolation is where 2 populations of the same species where are separated by a geographical barrier
Variation is the differences in traits and physical features in a population
Some Wolves have an easier time surviving in the habitat than others and adapt to the environment more easily. Those wolves mate with others who also have an easier time surviving in the specific lake environment.
Selection is where some organisms have traits that give higher chances of survival and reproduction
The offspring of the wolves inherit traits from the parents such as thicker fur and longer tails which help them in the habitat that they live in
Inheritance the process of when a fit organism that survives reproduces and passes down traits which their offspring will inherit
When the wolves meet again, they are a completely different species as the ones by the lake have thicker fur and longer tails whereas the ones by the mountain have different traits that are suited for the mountain
Time is the important factor as over time certain traits that are helpful to an animal's habitat become more popular