Final answer:
Zoroastrians dispose of their dead through cremation or exposure to the elements.
Step-by-step explanation:
Zoroastrians dispose of their dead by using two main methods: cremation and exposure to the elements. Cremation involves burning the body, while exposure to the elements refers to leaving the body in structures known as Towers of Silence, where it is exposed to natural elements and eventually decomposes. Zoroastrians believe in the purity and sanctity of fire, which is why they use fire in their religious rituals and ceremonies.