One feature of the cities of the indus valley civilization was well-engineered drainage canals no use of a writing system large stone houses in the city center where elites lived and smaller houses of common people farther out approximately 20% of the land set aside for graveyards, featuring elaborate tombs sophisticated military foundries for making weapons

Well-engineered drainage canals were one of the features of the cities of the Indus Valley civilization

The people from the Indus Valley civilization were shown to have participated in sea trade network that extended from Central Asia to the Middle East. Their economy heavily depended on trade.

currancy

explanation:

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.