Alot as far as i know unless you need it in formal terms.
Answer:
The centre of the earth is harder to study than the centre of the sun." Temperatures in the lower mantle the reach around 3,000-3,500 degrees Celsius and the barometer reads about 125 gigapascals, about one and a quarter million times atmospheric pressure.
Explanation:
Answer: I maybe wrong but i'm pretty sure its C) Kinetic energy
It is an example of liquid. if thats what you are asking for...