15. Possible Animal Life
One of the things a planet needs to be possible for human life is creatures we can both tame and as well as eat. Whether you’re a vegetarian or not, meat is a high source of food for human beings that many truly need. It helps with energy, brain function, and much more.
Our new planet needs to have a supply of animal life or be possible for our Earthly animals to live there. Animals also supply other food sources beyond meat. We get things like milk and eggs from animals we’ve been able to domesticate alone. Some even help with manual labor, like horses and oxen. Thus, their role in our lives is critical.