The teacher told all the students that listening was key, it was the main way they would gain what?
Options:
- empathy
- anxiety
- knowlege
- falling down
- hear things Hmmm, let me think.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Knowledge requires understanding and knowing many topics and concepts. One can acquire good amount of knowledge if one listen to teachers carefully.
So, the answer is knowlege.