Question

What layer of the world can we live on?

Answer 1

Hint: There's more to the world than what we will see on the surface. In fact, if you were ready to hold the world in your hand and slice it in half, you'd see that it's multiple layers. But in fact, the inside of our world continues to carry some mysteries for us.

Complete answer:
The crust is what you and I survive and is far and away the thinnest of the layers of earth. The thickness varies depending on where you're on earth, with oceanic crust being 5-10 km and continental mountain ranges being up to 30-45 km thick.
A remote expedition to the deepest layer of the Earth's oceanic crust has revealed a replacement ecosystem living over a kilometre beneath our feet. It's the primary time that life has been found within the crust's deepest layer, and an analysis of the new biosphere suggests life could exist lower still.
The layers of Earth provide geologists and geophysicists clues to how Earth formed, the layers that structure other planetary bodies, the source of Earth's resources, and far more. Modern advances have allowed scientists to review what lies beneath our feet in more detail than ever before and yet there still remain significant gaps in our understanding.

Note:
The world is formed from three different layers: the crust, the mantle and therefore the core. This is often the surface layer of the world and is formed of solid rock, mostly basalt and granite.
Inner core it's the thinnest layer of the world. The crust is 5-35km thick beneath the land and 1-8km thick beneath the oceans.