Based on the given sentence: "She <u>plummeted</u> down the rabbit hole without any thought for her own safety", the word that best completes it would be "plummeted".
<h3>What is a Sentence?</h3>
This refers to the use of words that serve the purpose of being used as a means of communication and contains a subject and a predicate and makes complete sense or can express a complete thought.
Hence, we can see that based on the original sentence, the actions of the woman is being narrated as she seemed to be in a hurry to move down the rabbit hole and do something very important to her, without caring for her own safety.
With this in mind, it can be clearly seen that the speaker is said to have run down a hole in a haste and this shows that she did not have any time to waste and from the answer choices available, the correct answer is plummet.
Read more about sentences here:
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The complete answers are
anxious
isolated
plummeted
pursued