Read the sentence from fish cheeks. a plate of squid their backs crisscrossed with knife markings so they resembled bicycle tires. amy tan compares squid to bicycle tires to show that the squid -are black in color. -are round in chape -do not look appetizing. -have a grooved surface.

The right answer is "have a grooved surface"

Amy Tan compares squid to bicycle tires to show that the squid has a grooved surface. The explanation for this answer is set out in the text, when Amy Tan says "  ... their backs crisscrossed with knife ..." This part of the text makes explicit that the back of the squid, its surface was grooved, just like the tires of a bicycle.

where is the writing? (so i can answer)

they are all talking about chocolate (next time you post a question with "which" post the choices too)