Why are most animal faces eyes at the top, nose in the middle, and mouth at the bottom? How are they all so similar?
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What humans perceive as “most animals,” i.e. vertebrates, is a relatively small group of animals that are all still relatively closely related.
When you start looking at invertebrates, you’ll see that most animals do not have this *exact* facial structure; e.g. the closest thing most insects have to a nose is on *top* of their head.
That said, it’s also because it’s advantageous:
1. Most creatures have a head because it’s advantageous to be able to swivel, angle, and point your sense organs without having to move your whole body.
2. Most creatures have their eyes and mouth on the front(ish) because you want to be able to see where you’re going and what you’re eating.
3. Most animals, lacking hands, need their mouths on the bottom of the face because it would be a huge hassle to turn your head upside-down just to eat something on the ground in front of you.
And there’s your face plan.
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