Where does geothermal energy come from?

D) inside Earth for all my fellow struggling plato users

Geothermal energy has two primary sources, primordial heat, and radioactive decay. Primordial heat is what resulted from the creation of Earth 4.5 billion years ago, when the energy and mass from colliding cosmic matter made Earth a large, hot piece of space debris.

For number one I’m guessing 35% because for transportation it says 35 and bus is transporting/transportation.