How did the indus river contribute to the development of civilization in india a. it provided temperate weather all year long. b. it allowed india to freely trade with other nations. c. it allowed people to travel freely from one place to another. d. it would overflow, making the land suitable for farming.

I would say the correct answer is B: It allowed India to freely trade with other nations.

After Pakistan came into existence, a water control treaty  signed between Pakistan and India in 1960 guaranteed that Pakistan would receive water from the Indus River and its two tributaries , the Jhelum River and the Chenab River  independently of upstream control by India.