The third option is correct: "Art and math are courses architecture students must have on their schedules."
The other two uses the word "their" when referring to a single thing/person. The correct word should be: "Each architecture student must plan his/her high school and college courses carefully." and "Every school of architecture sets its own specific requirements."
Personification is adding human characteristics to a non-human object. (D. "The landscape listens, shadows - hold their breath.") The landscape listening as if it has ears, and shadows holding their breath are things a living thing would do, so (D) is the best answer.
Hope it helps.
You can have your name at the end of the diary entry.
