He was a good president because he created more rights
I would think that's true. Having the means to create more products would lead to an increase in trade, assuming the products are not meant solely for domestic use.
I would go with 'Major sandstorms destroyed the crops' because the Indus Valley civilization most likely declined by something affecting the food.
Answer:
tools, materials, labor, animals, seeds, plants
D) to move to a neighborhood of people from their home country.