What is the most important element to communication?

This is a question asked in my Business Communication class. I'm trying to get a few point of views.What is the most important element to communication?
Listening is the most important. You talk I and I listen. (the sender-receiver method of communicating.)What is the most important element to communication?
The most important element in communication is non-verbal communication, or body language. Fifty five percent of communication is body language and eye contact. Thirty eight percent is vocal (pitch, speed, volume, tone of voice), and only seven percent are the words we use.What is the most important element to communication?
Listening, not listening.