Answer: wait explain it in different words is this a question for school for school or something
Explanation:
They can be used as a defense mechanism.
The Missouri Compromise occurred in 1820. It set the idea that all states North of the 36. 30 parallel would be free and all below would be slave states (minus Missouri). It was an attempt to contain the spread of slavery.
The question is asking about what happened in the book, The Hobbit, of J.R.R. Tolkien What happened was that Bilbo did not tell the Dwarves about the One Ring the he found - which was the first time the Ring made Bilbo behave in a way as to protect it from others.