The specific scientific field that mainly involves theories of communication apprehension having predominant hereditary basis would be the communibiology. To add up, this term could also refer to a study focusing on "<span>neurobiological foundations of human communication behaviour."</span>
<u><em>Communibiology</em></u> suggests that communication apprehension may have a predominantly hereditary basis.
Explanation:
Communibiology is a theory purposed by McCroskey & Beatty that studies the neurobiological foundations of human communication behavior, <em>it statutes that genetics have an important impact on the development of communication behavior (Up to 80%). </em>
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I'm pretty sure the answer would be: If the person is upright, carefully ease the person to the floor. this is of course after calling 911, followed by looking for the object lodged in the persons throat.