Have you ever noticed that everything on your body has a useful purpose? It's as if the human body was purposefully and carefully designed to allow us to enjoy life on earth.
You have eyes to see, ears to hear, a nose to smell, taste buds to taste and skin to touch. And all these are connected to your brain with complex electrical circuitry. The trillions of neurons in your brain are precisely ordered to receive and analyze this sensory information.
You have a digestive system to provide you with energy, a respiratory system to provide you with oxygen, a lymphatic system to clean up your body and protect against diseases, a circulatory system to provide you with life giving blood, a reproductive system to have children, which only works with the perfectly complementary system of the opposite sex, a brain to store information, perform analysis, control your body, create and play, among many other uses.
Besides the 5 senses and the body’s major systems, there’s also the “small” stuff like your eyebrows that prevent sweat from getting into your eyes, or your nails so you can scratch yourself when you're itchy. And countless other utilitarian features.
These are just a few examples of amazingly useful features of the human body. What's even more amazing is that they all work together in perfect unison!
Does it make sense to believe that all these very useful and interconnected features result from random mutations? Based on scientific discoveries, atheists and naturalists believe this to be true, with evolution as the central narrative. They conclude that since we are here, that it must have happened this way, however unlikely it may appear. But you can flip this argument on its head and conclude that discoveries of ever-increasing complexity, like DNA, reinforce the belief that such design requires a designer, and creationists call him God.