Evolution is nothing more nor less than making new stuff out of old stuff. "Growing" is another good word for it. It's the way people create things, and it's the way a lot of the things we see in the world appear to have been made. No one sat out and arranged all the different rubber companies and lumber companies and factories and factory-machine suppliers and on and on that result in the modern 10-pack of pencils you can buy in a store for $1. It just emerged over time as people in various parts of the process gradually made themselves more efficient. People just can't design something of this scale. They can only grow it, not plan it.
Thus, evolution is another kind of cause. Difficult. We have asked for centuries -- millennia? -- what does free will mean, when God can do everything? It seems to mean nothing, but then, can any healthy person really believe their decisions don't matter? Likewise, who causes evolutionary results to come to pass? No person is in charge and planning it out, but in many of them God does not appear to step in and perform miracles, either. Difficult indeed.
It makes my head hurt to think too much about it! But my takes so far are (1) God gave us a sense of free will, and he wants us to feel like we are using it. What murky record we have of his wishes consistently imply that our choices, especially our choices regarding him, make a difference. (2) God is interested in processes as well as results. He gave us a world where spiders and economies and cultures and many other things grow from old versions into new ones. The growth itself is part of his plan.
At any rate, evolution appears to happen. It is a pity that evolution has been tied up with the question of the original of the human animal (although, if God did grow the human animal in that way, isn't that just more evidence of his grandeur?). The concept is helpful in many other areas. Art, economy, culture, science, scholarship, and even engineering all are grown, not designed from scratch.
I don't know the answers here, but I know that evolution is a powerful tool and a powerful explainer. Ignoring evolution means both that we set aside a useful tool, and that we blindfold ourselves to an aspect of the creation we dwell in. While an evolving, growing world seems very weird, it seems to be what we have. Surely God wants us to study his creation that we dwell in. Surely he wants us to learn to thrive in it.
But it most certainly is a challenge. Thinking about evolution hurts the head, and it hurts it in the same way as thinking about free will.