Money- a current medium of exchange in the form of coins and banknotes.
notoriety- the state of being famous or wellknown for some bad quality or deed
The answer is :A) You would go through one sort of material, and then a different, denser material, and then a still-different, still-denser material, because the planet is made of concentric layers, sort of like an onion.
They are interested in studying the earth and how I changed over time