The pacing of the passage affects the reader's interpretation in the following way:
The pace of the text quickens to convey the characters’ resolve to finish the windmill.
This interpretation aligns with the description of the animals being "tired but happy" despite their hard work and the challenges they face. The mention of the windmill being "almost half built now" suggests a sense of progress and determination among the animals, indicating their commitment to the project. The emphasis on the windmill compensating for their struggles implies that it serves as a symbol of hope and motivation, driving them forward despite their tiredness. Thus, the quickened pace reflects their resolve and reinforces the theme of perseverance in the face of adversity.