Final answer:
Being bound up made Gulliver very sad, as it caused him to feel overpowering stinging melancholy and a not-unpleasing sadness. The correct answer is 2) It made him very sad.
Step-by-step explanation:
Being bound up made Gulliver very morose. It had the effect of making him very sad. This is evident from the description of him feeling overpowering stinging melancholy and experiencing a not-unpleasing sadness turning into a fraternal melancholy.
The mention of Gulliver contrasting himself with the bright silks and sparkling faces he saw, and the association of misery with being bound up, further emphasizes his sadness.
The word morose implies a state of being sullen, sulky, or ill-tempered, so the effect of being bound up on Gulliver was that it made him feel very unhappy. Thus, the correct answer to the effect of being bound up on Gulliver is 2) It made him very sad.