Which was true when the aryans migrated to the Indian subcontinent?

When the Aryans migrated to the Indian subcontinent around 1500 BCE, they brought with them a new social structure and religious practices that significantly influenced the region. This migration marked the transition from the Indus Valley civilization to the Vedic period, characterized by the composition of the Vedas, sacred texts that laid the foundation for Hinduism. The Aryans primarily spoke Sanskrit and introduced agrarian lifestyles, which transformed the existing socioeconomic landscape. Their arrival also led to the development of the Caste System, which structured society for centuries to come.