system
Given the following post, respond as if you're commenting on Reddit:
human
Confused on how mutation in evolution works?

I am 15 years old and just get getting in to depth in evolution and have one question: How does the body know (also if it knows) how and when to mutate to do something. Example: How the Giraffe formed a long neck to eat leafs off trees. Thank you (sorry if I asked the question wrong).
Thanks everybody!!!
gpt
You're looking at it wrong. Something doesn't decide that it needs to adapt and then sets about changing itself. Mutations happens and the ones that confer an advantage to the organism remain (because in some way they increase the chances of breeding) and get passed on and so it continues.