Depending on how you view the world, things need to change or adapt to survive. The most obvious contender is the chameleon which changes colours to help it blend into the environment. The mimic octopus can change to make itself appear like various
Occasionally, late at night, I like to imagine the lives of the heroes of the various games that we, people, play. Just run with me on this for a moment, indulge my brief insanity here please, this will all make sense shortly. Imagine if you will