Ok I'll send the answers soon
Hello! The Three-Fifths Compromise addressed the issue of counting the population, so that there would be proper representation. Slaves votes would be counted as three-fifths of a person. With a lot of people in the U.S., it would be pretty much impossible to get the exact population. It was a controversial issue that had mixed opinions by the delegates. There were many of those that argued against slaves being counted at all.
Outer core.
The densest layer is the inner core but it is not given as an option. The outer core is closet to the inner core, therefore it is the correct option.