This is not a question, but more of a statement and/or scenario.
If this is about checking the grammar, for some report or something, it looks good. I find no errors.
I tried looking up this, and it has not been previously stated anywhere, so I don't know where your getting the question.
Comment to me if there are multiple choice answers or something, I'll try my best to answer.
Answer:
B) a musical technique to describe people
Explanation:
An organum is basically a plainchant melody with at least one voice to enhance the harmony.
