Here we continue from the previous post introducing some useful biological concepts. As with before, these are empirically sound and don’t conflict with being anti-evolution that I can see.
Next idea: the process of copying genes (which happens when parents give a copy of their genes to their children) isn’t perfect. It’s pretty darn good, all things considered, but occasionally the chemical that comes out isn’t identical to the one that goes in.
And finally, natural selection, also known as “survival of the fittest”. This one really just makes intuitive sense; if two animals are competing for the same resource (eg food), then the one that is faster/stronger or in some other way more capable is going to get the resource. The other animal is going to go hungry, and is more likely to die.