Que clased de sustantivo es passed

Does anyone know the answer to the question?

Which detail from the text most strongly supports the inference that releasing a pet into the wild can change the balance of nature within an enviorment

Read the excerpt from chapter 6 of  animal farm. by the autumn the animals were tired but happy. they had had a hard year, and after the sale of part of the hay and corn, the stores of food for the winter were none too plentiful, but the windmill compensated for everything. it was almost half built now. how does the pacing of this passage affect the reader’s interpretation of the text? a flashback to earlier events provides a pause in the pacing to slow events down. foreshadowing of events provides information as to what will happen to the windmill. the pace of the text quickens to convey the characters’ resolve to finish the windmill. the pace of the text quickens to move the story to its climax, the completion of the windmill.