What was the fundamental question addressed in each of these congressional acts? Should states be able to secede from the Union?

Should the U. S. expand westward?

Should states be allowed to nullify federal laws?

Should slave labor be allowed in new states?

The fundamental question for the Missouri compromise was “Should slave labor be allowed in new states?” because free states and slave states both wanted equal representation. By making Missouri a slave state, Maine was made a free state to keep this equal.

The fundamental question in the Compromise of 1850 is also “Should slave labor be allowed in new states?” because it allowed new territories such as Utah that the US gained from Mexico to decide whether to allow slaves or not.

The Kansas-Nebraska act is the same as the others because it repealed the Missouri Compromise and required that all states/territories decide whether slavery would be allowed or not.

I hope this helps! Good luck!