Development of Human Beings
The same principle applies to human beings. Life is impossible without the interaction of those states and factors. Now, did we realize how far human beings are from truths without regarding these verities?
All those external factors I mentioned cannot be seen with the current state of science, and we should not expect to see them in the same way that we see flesh, bone, and blood during dissection. However, we can easily experiment with the notion that life vanishes if these factors (including air, sunlight, ethereal beings that we breathe in, and other things and factors in the atmosphere) are cut off. No tree can grow, and no human can find or continue life.