Answer:
Number 3.
Step-by-step explanation:
This passage, one of the most famous and saddest in the novella, shows Gregor, who at this point had almost been completely turned into a horrible vermin due to his family´s disregard and hatred of him and his condition, suddenly reawakening in his purest form of humanity, and turned into a emotive state due to the beauty of his sister´s music, forgets his condition and leaves his room so as to get closer to beauty and to his sister. This passage foreshadows Gregor´s final demise.