Final answer:
Mozart utilized the shrill ululations of the zurna, a type of oboe, to evoke Janissary spirits in this song.
Step-by-step explanation:
Mozart utilized the shrill ululations of the zurna, a type of oboe, to evoke Janissary spirits in this song. The zurna is a traditional instrument used in Turkish military music, specifically by the janissaries. The high-pitched sound of the zurna was intended to create a fearful and captivating mood in the listener.