Answer:
The answer is Mythological battles featured prominently in the Parthenon carvings and Athenian architecture had a sense of grace, balance, and perfection.
Reason: They carve the buildings to show the battles. If you read the book, it would say that Athenians architecture had a sense of grace, balance, and perfection, so that's how I got that.
Ps: I also took the test and got it right