It's the most plausible way for nature to improve species of animals.
You yourself are probably an evolution on the human species with some traits that may be better and some worse that your mother(by hypergamy) selected in your father so they can pass that genetic legacy down to you.
Great answer. Things that come to mind from when I was teaching Evolution: You'd be surprised how many kids hear evolution and think of pokemon-like stuff. Not even directly pokémon, but like there's this notion of evolution being "an improvement" in their heads- faster, smarter, stronger but that's not a good way of understanding it, in fact it's just wrong. The phrase "survival of the fittest" also causes this confusion in my experience. Fittest = Most adjusted to their environment (NOT STRONGEST OR SMARTEST) ~ which ultimately means = most likely to survive long enough to reproduce, more or less. Like, in Biology their kinda is a "defacto" meaning to life: keep the tree of life going, yo. Life / Biology doesn't care how you do it, as long as it works. Evolution is not a mechanism that produces the créme de la creme, straight A students- it's really more interested in about "meh, good enough ~ C'ssssss GET DEGREES YO" If in your creation mutations occured that made you more likely to reproduce and pass those mutations on, then life keeps that shid going. If you roll mutations that hinder that then: how you gonna pass those on, yo? You don't. Another important factor is not comparing organisms. Like, you can't compare a lion and a fish, yo. Maybe in your head you're going, aww yeah lion > fish, no again this shid ain't pokémon motherfugger. Throw a lion in the ocean and a fish in the savannah what happens? They both ducking suck, ok? Because it's about their environment (and more accurately reproduction). Mutations are not good or bad, they are contextual, every single one. Something that works for one organism isn't guaranteed to work for another or something that is absolutely retarded in one context is fuggin brilliant in another. It all depends, yo. Finally, another thing to keep in mind about science in general is that no scientist in the world goes out trying to "prove" anything, ok? There is no absolute truth in science, there is only ever "this is the best model of this aspect of reality that we have at the moment" the more useful, practical, PREDICTABLE the model the more consensus. But no scientist worth their shid will tell you anything is 100%, it's usually just the best we got. In fact, scientists constantly try to DISPROVE things, and let me tell you, I'm pretty sure no motherfuggin theory in Science has been challenged more than evolution, yo. It's pretty tight, ok? True debates about it are really in the details, not general picture. But, no, like for real kids have the craziest misconceptions and there are so many, especially with evolution. They imagine shid like giraffes willed their necks to be long, as if they thought about it.