The fact that berta uses her chin instead of her finger to point at an object across the room illustrates that communication is

symbolic.

Explanation:

Symbolic communication is the messages that are transmitted through our attitudes, gestures, manner, being, etc. That is, symbolic communication is the form that human beings use through symbols to conduct their actions, transmit knowledge, techniques and ideas, without the use of words or sounds, but behaviors and gestures that symbolize a message. An example of this can be seen in the question above, where Berta used her chin to point to an object.

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