Final answer:
The oldest religion, Hinduism, originated in the Indus River Valley in the Indian subcontinent about 4,500 years ago.
Step-by-step explanation:
The oldest of these religions originated in the Indian subcontinent. Hinduism, the oldest religion in the world, has its origins in the Indus River Valley about 4,500 years ago in what is now modern-day northwest India and Pakistan. It emerged contemporaneously with ancient Egyptian and Mesopotamian cultures. Among the major world religions, Hinduism is the third-largest, with approximately one billion followers. The doctrine of Hinduism includes a belief in a divine power that manifests in different forms, notably including the three main aspects: Brahma, Vishnu, and Shiva.