Final answer:
Egyptian architects used varying ceiling heights, demonstrated by the hypostyle hall in the Temple of Amun-Re at Karnak, to create differences between spaces in cult temples, incorporating clerestory lighting.
Step-by-step explanation:
One means that Egyptian architects used to create differences between spaces in the cult temples was by varying ceiling heights. The hypostyle hall in the Temple of Amun-Re at Karnak demonstrates this technique with its 134 columns and the central 12 columns rising to 69 feet, allowing for clerestory lighting. The varying ceiling heights, together with the clerestory windows, allowed light and air to enter the dark spaces below, thus creating a transition from the earthly realm to the divine within the temple's architecture.