Explanation:

horse, cow and iron

1. The Aryan people's life style was centred around religion and spirituality. Their personal and social lives were centred around religious philosophies and rituals. But Indus valley people did not give much importance to religion or spiritual philosophies. They focused more on trade, commerce and cleanliness. 2. Aryan people were vegetarian and vegetarianism was associated with their religious beliefs . But Indus valley civilization people were non-vegetarian. 3. Aryan people were nature worshippers and believed in the preservation of nature . Example of this is vegetarianism , worship of certain animals and rural lifestyle were practised by the Aryans. But Indus valley civilization people believed in the exploitation of nature and natural resources (too much of this caused flood and famine which caused the demise of indus valley civilization.) 3. Aryan people knew the use of iron , but indus valley civilization people were not aware of iron and used bronze. 4. Aryan people knew the use of horses which gave them strength, speed and helped them in long distance travels and battles. But Indus valley civilization people did not use horses as they probably did not have any need for this. So they did not import or learn the breeding of horses from other civilizations, as indigenous horses were not available in Indus valley area in those days. 5. Aryan people used Sanskrit language which is the source of all Indo European languages be it English, German, Parsi or Hindi . But Indus valley civilization people used some unknown language. This language has died .