They are important because without them there is basically no drawing every drawing includes lines
If you are referring to during the time of slavery, up north there was no slavery and they were free. If you are referring to during the civil Rights movement, African Americans faced less discrimination up north and no Jim Crow laws.
It is true a quarter note has a quarter rest and so does each other note and so on
The answer is artistic. This is because artistry is in its original form, just like alternative music. It's not going by the crowd and only being influenced by how you feel. Hence, art.
