What belief did Zoroaster teach?

He taught that the universe is dominated by good, not evil.
he taught that the universe is governed by natural laws, not gods and goddesses.
He taught that the universe is locked in an eternal struggle between good and evil.
he taught that the universe is ruled by many different gods and goddesses.

He taught that the universe is locked in an eternal struggle between good and evil.

Zoroaster taught the belief that the universe is locked in an eternal struggle between good and evil.

Zoroaster, also known as Zarathustra, was an ancient Persian prophet and philosopher who founded the religion of Zoroastrianism. He taught a monotheistic belief system that was centered around the idea of a supreme deity known as Ahura Mazda.

According to Zoroaster, Ahura Mazda is the creator of all things and is the embodiment of goodness and truth. Zoroastrianism teaches that the universe is governed by a cosmic dualism, with a constant struggle between the forces of good and evil. However, Zoroaster believed that good ultimately prevails over evil and that individuals have the power to choose between the two.

So, to answer your question, Zoroaster taught that the universe is locked in an eternal struggle between good and evil.