The correct answer should be this sentence: <span>It responds to natural impulses.
The narration contains descriptive words about the wise reaction of the dog did when frostbite attacks, it made efforts to avoid the consequences of not responding to natural impulses abruptly.</span>
What the dog’s reaction reveals about it is that It responds to natural impulses.
Explanation:
The excerpt talks about how the dog knows about the dangers in nature, while the man does not follow his instinct or the warnings based on the dog's reaction taking him to his fatal end, while the dog survives to all the raging weather, and the intense cold of winter, by staying away from the man and going with his animal thought.
