“Populations evolve through a process known as natural selection which allows individuals with beneficial traits for survival to breed with other individuals who share those traits, eventually leading to offspring who only exhibit those superior traits.” -from: https://www.thoughtco.com/only-populations-can-evolve-1224608
Hope this helps! :)
They change cause they want to change so leave them alone
Our earth is in constant nonstop motion
Contamination and poorly practiced fishing
