Final answer:
The Aryan civilization emerged from nomadic Indo-European speakers who migrated to the Indian subcontinent and introduced the Vedic religion. They settled in northern India, taking advantage of fertile lands and river systems for agriculture.
Step-by-step explanation:
The Aryan civilization originated from nomadic Indo-European speakers who began migrating from the Eurasian Steppe north of the Black and Caspian Seas around 3500 BCE. They entered the Indian subcontinent as conquerors around 1800 BCE, bringing with them the Vedic religion and the Vedas, a collection of hymns and rituals. The Aryans settled in northern India, along the plains of the Ganges River, and on the Deccan Plateau. They chose these areas for their agricultural potential and the presence of rivers for irrigation and transportation.