ANSWER:
C. Source
STEP-BY-STEP EXPLANATION:
A North Face ad shows a rock climber hanging underneath a treacherous overhang, with the tagline, "Never stop exploring." In terms of the communication process, the SOURCE would be North Face.
The source in the communication process may be a company or person who has information to convey, which is North Face in this example.
A source or sender is one of the basic concepts of communication and information processing. Sources are objects which encode message data and transmit the information, via a channel, to one or more observers (or receivers).