I believe the proper answer would be "Sentence 3".
The correct answers are A. girdle and B. shame.
Sir Gawain wore a green girdle (which is practically a belt) around his neck which was given to him by the Green Knight's wife. In the beginning, the girdle represented his strength, but later on it gained the meaning of his shame. He took another man's wife and he dishonored his lord so he started wearing the girdle as a symbol of that.
A. to persuade the reader into caring about the effects of pollution
I believe your answer is "No longer tortured by the pangs or hunger" Hope this helps!! :D
