I was going to disagree with the statement that we produce a human body, thinking of ourselves as merely causal agents acting through our will. But a second thought is that in being a body-soul unity, we are also those silent processes that keep us in life. There is a union of two haploid cells that is seen happening physically in the creation of a new person. We know there to be a combination of genetic material at a molecular level that goes on as this happens. Information is collected from two parents to produce the physical form of a new person.
Although God breathed into the initial matter which formed the body of Adam, Eve was created from him. A new individual person was brought into existence so that we may be reunited in love. Similarly, I believe we are created body-spirit persons at the moment of conception. God does not breath His Spirit into someone that already exists.
That would tie in to how Adam was initially created. He could not have come from two animal gametes, which would combine to form another animal. It’s not stated how matter was brought together to shape Adam’s body. Whether it was moulded in the macrocosmic womb that is the environment or created as one seed the microcosm of an animal womb, I don’t know. That we look the way we do which is similar to hominids to my mind is because God wanted a body that would work and fit in with the rest of nature. It’s not really natural selection, but the other way around, similar to what we do in breeding animals, except that we would not be direct descendants from those animals. Rather, it was a matter of what was good for them would be good for us. That information was used to make the human body, capable of living on earth and also knowing God.
There are different stories that encompass the data.