Hinduism is one of the oldest religions, characterized by a variety of beliefs and practices, including the worship of multiple deities like Brahma, Vishnu, and Shiva. It emphasizes concepts such as karma, dharma, and the cycle of samsara (rebirth). Buddhism, founded by Siddhartha Gautama (the Buddha), focuses on the path to enlightenment through practices like meditation and ethical living. Jainism, originating in India, teaches non-violence and truth, emphasizing the importance of ahimsa (non-harm). Sikhism, founded by Guru Nanak, promotes equality, community service, and devotion to one God.