Which was the Backbone of Indus Economy?

Agriculture

Agriculture was the Backbone of the Indus Economy. Agriculture appears to be the main occupation of the Indus people. The Indus people used various types of weights and measures. A strict control was exercised to maintain the proper standard of weight. Their economy was entirely dominated by horticulture. Unearthed ornaments, plates and dishes, drinking glasses, tools made up stones, painted bowls and jars further established the facts about their prosperity and development.