Okay. So give me an example of how natural selection can create a need for something like an eye, or skin, or anything complex that serves a function, when those things do not yet exist.
Actually, you have the order wrong. Evolution is not directed, does not have a goal. Natural seclection does not create a need.
What happens is random changes. Let's use vision as an example. Some critter is born with a mutation that let's it sense lighter or darker areas. For example, it may be able to sense shadows and so can tell when it's close to prey. It has a better change for finding food than the other similar critters that can only stumble on dinner. So it has a better chance of eating well and living long enough to reproduce and pass on that mutation.
The change was random. Natural selection filtered out those without the mutation.
Aslan is not a Tame Lion
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