Answer: The options are not given,
Here are the options.
A. channel
B. feedback
C. message
D. sender
The correct option is C
MESSAGE.
Explanation:
It is message because it is written or verbal or recorded words or communication or ideas transmitted by the sender to the receiver.
It include three aspects, content, structure and style.
The content entails the information and communication, how the information is important, useful and can be read to comprehend.
The structure of a message entails the tone .
The style include how the sender compose and write the message.