The text's example of the teacher calling roll and asking, "now, where is . ." and a student replying "ernesto? " because he knew just who the teacher was looking for illustrates what component of communication?

I believe the answer is: Communication is collaborative

Which mean that in order for a communication to be formed, both the giver and receiver of the message should play their own role properly.

The giver of the message had the role to ensure the delivery of the information happen clearly, and the receiver had the role to ensure that he/she provide the necessary attention and cognitive process to receive the message.

competition i thin

answer; i believe the above is (false)