Answer/Explanation:
Natural selection is the process in which populations of organisms adapt and change due to their environment. Natural selection can cause a population to go extinct because if the organisms are not suited for their environment, they will eventually die off.
Let's take Charles Darwin's finches on the Galapagos Islands for example. These finches have an incredible diversity in their beak size, shape, etc. This is because the finches need to adapt to their environment in order to survive. During his studies, Darwin noticed a drought was happening on the islands. The finches with the larger-than-average beaks started to die off because the only food available was tiny seeds that only small beaks were able to get. Because of this, the population of the finches changed throughout generations to have smaller beaks, so they wouldn't starve. This is a prime example of natural selection because the finches with the small beaks survived while the finches with the larger beaks did not.
In conclusion, natural selection can help explain how a population becomes extinct because if a population is not suited for their environment they will not survive.
Hope this helps!! If you have any questions about what I said, please leave them down in the comments!
