Final answer:
Zoroastrianism is most closely related to Judaism due to their shared aspects of monotheism, ethical codes, and concepts of good and evil, with Zoroastrianism influencing other monotheistic religions including Judaism, Christianity, and Islam.
Step-by-step explanation:
The religion Zoroastrianism, a monotheistic religion of the Persians, has most in common with Judaism. Both Zoroastrianism and Judaism have monotheistic beliefs, an ethical code, and concepts of good versus evil. Moreover, Zoroastrianism is credited with influencing other monotheistic religions of the Middle East, including Judaism, Christianity, and Islam, especially in terms of ethical beliefs, questions of the afterlife, morality, judgment, and salvation.
Although these religions developed different practices and beliefs over time, they share foundational elements likely influenced by early Zoroastrian teachings. Zoroastrianism itself has dualistic elements, with a focus on the ongoing struggle between Ahura Mazda, the god of good, and Ahriman, the spirit of evil, and emphasizes the role of human beings in this cosmic conflict.