Answer:B. Crust,Mantle,Core
Explanation:If I understand this correctly,the question is asking their order from least dense to the most dense.
The answer is A Give me branliest
The letter 'e'
The last letter of time is e & the first letter of eternity, again is e. Every week has 4 e's & there's only one e in "a thousand years"
I think it's A because that sentence was like the shortest summary for the whole paragraph.
I'm sorry if I was wrong, though. I hope this helps! Good luck!