According to zoroastrianism, how should people demonstrate their faith?

   Doing good deeds in contributing to the fight against evil

Explanation:  Zoroastrinaism is a monotheistic religion created in the 6th century BC on the Persian territory, its characteristics similar to Islam, although it has similarities with all three monotheistic religions. It contains all the elements as other religions, and this is the holy book - Avesta, rituals, belief in angels, demos, the savior of the world. It was named after the founder, the prophet Zoroaster, by whom, there is a Supreme Universal God who requires good deeds from people, and thus contributes to the cosmic battle against evil.

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.