22. A Molten Core
Very little is made about Earth’s core, but it plays a big role in our lives. The core helps with a lot, some of which we’ll actually be going over in other examples of the things a planet needs to sustain human life. However, the biggest thing about the core is that it helps to give us a lot of the metals we have that are pretty crucial.
Things like Iron are involved in this, which humans actually need in their lives. On top of this, the core is responsible for plate tectonics and magnetism, both of which play a huge role. The core is comprised of things like iron and nickel as well as things like gold, platinum, and uranium. All of which can be quite important to the overall planet itself. Thus, we need something like this wherever we end up.