I believe it is dry because of the word desert and deserts are dry. Acrid also means in the dictionary bitter or harsh.
I don't know what the example is, but taciturnity means quietness. So the answer is D.
Answer:
(( I think you have to put the question for people to answer...))
Explanation:
I'm not exactly sure, but to use common sense, I'd say eye-contact. You explicitly said, "nonverbal," and eye-contact is the most reasonable one.
