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.
The best answer here is choice B. We can determine this because of the tense used throughout the passage itself. Bearing this in mind, choice B matches the tense perfectly.
Choice A does not work at all because the verb "am" makes no sense in the context of the sentence. The same is true for choice C. The passage is not in present tense, so it cannot be this choice. Choice D could make sense, except that this is in the future tense versus the past tense.
I believe the dependent variable in this experiment is the time for salt to dissolve since it <u>depends</u> on the speed of stirring (independent variable).
Therefore, the answer is:
Time for salt to dissolve
Hope this helps! :D
The best device to use if you want to use the seafloor sediment to study<span> a long period of history is a. piston corer.
</span>ANSWER:::piston corer <span>or coring witch ever one your answer choices list
hope this helped :)
Have an amazing day</span>
