The answer is B) It suggest a tone of worry. The reason is because the phrase "knitting their cheeks" means the that the llamas were moving their jaws. This along with the fact that they were contemplating the writer suggests that the llamas are unsure of the writer.
Answer:
When I saw Joe in the distance, I waved at him, but he did not recognize me.
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Impetuous means done quickly and without a care
