Final answer:
The belief in complete trust or confidence in the doctrines of a religion is called faith.
Step-by-step explanation:
Religion is a system of beliefs, values, and practices concerning what a person holds sacred or considers to be spiritually significant. It often involves the belief in the existence of a deity, such as God, and encompasses various religious traditions and teachings. For example, in the major religious traditions of the West, such as Judaism, Christianity, and Islam, believers place their complete trust and confidence in the doctrines and teachings of their respective faiths.