Answer:
The Indo-European Aryans migrated from centralasia to india around 4000 years ago transforming the weapons,religions.and language of the subcontinent.Some scholars believe they conquered an already weakened indus valley civilization, using superior military technology such as the war chariot.The Aryans developed a system of social classes known as caste system. Under the caste system ,Aryans divide the people into caste or groups according to their occupation. Aryans created four main castes.The top castes were made up of priests,kings and warriors. The main occupation of the people is cattle rearing and their wealth was measured in the number of cattle.They practicied agriculture by clearing the forests.Metals used were copper,iron and bronze.Few people worked as goldsmiths, potters,spinners and carpenters.