Pick four questions

Why do we sleep? Because if we dont we would always be stresed and tired. Also our brain runs more fluently wen we have a good rest.

How did life begin? It began when God created it.

What's the universe made of? Scientifically speking its created of atoms, humans, animals, stars, and oxygen.

What's at Earth's core? From what teachers have taught me, The earths core is made of magma.