Answers:
1: c. Belinda's reflection in the mirror.
Step-by-step explanation: Belinda's beauty session in her toilette is playfully displayed as a religious rite in this part of the poem. She is the priestess and her reflection in the mirror is the goddess she worships.
2. b. Perfume imported from Arabia.
Step-by-step explanation: The verb "breathe" is obviously related to air and perfumes imported from Arabia were well-known objects of luxury.
3. d. Combs made from tortoise shell and elephant tusk.
Step-by-step explanation: The line "transformed to combs" made it very clear, at least for the readers of that time, when plastic had not been invented and combs were usually made of tortoise shell and ivory.