Explanation:

Option 2 is correct. Channel richness refers to the amount of information that can be transmitted from one person to another during any given communication. The more information that can be passed, the richer the channel.
There are three aspects to a communication that affect how rich it is. These are:
Whether it can handle many kinds of cues all at once. For example, a face to face conversation allows for verbal cues, cues that come from tone of voice, and cues that come from posture.
Whether it allows for quick feedback in both directions. For example, an email is richer in this sense than a conventional letter since it can be answered more quickly.
Whether it allows a personal focus to develop in the communication. For example, a telephone call is much more personal than formal report even if they convey the same information.
The more that each of these aspects is present, the richer the channel of communication. Therefore, Channel Richness cannot be the communication barrier.