Answer: Voting power
Explanation:
Abolitionists sought to abolish slavery in the United States and for that to happen they needed a majority in Congress. New States also got to send representatives to Congress and vote on government policy.
It was therefore imperative that a state entered the Union as a free state so that when it sent representatives to Congress (especially the Senate), those reps could vote in favor of abolishing or at least limiting slavery.
1. Services
2. Second level activities
They were not allowed to leave and so they had to stay
