The process of natural selection by itself is not a no-nonsense indicator of God. Example: there are four coyotes on the prairie, in the middle of winter. This is a wild prairie with no human habitation nearby. Throughout the winter, these coyotes hunt and occasional contact each other. By the time the spring thaw comes about, only one coyote has survived. This does not indicate the divine, it simply indicates that the surviving coyote was physically stronger and more capable than the other three. He had the experience while the other three were to physically weak to survive. Simple as that. However, your creationist friend is probably asking why this process originated, how it originated etc. For him, he has decided that God instituted the process rather than chance, so in his mind, it points to God.