I would go with 'Major sandstorms destroyed the crops' because the Indus Valley civilization most likely declined by something affecting the food.
Answer:
EPA was established on December 2, 1970 to consolidate in one agency a variety of federal research, monitoring, standard-setting and enforcement activities to ensure environmental protection.
Explanation:
google
Answer:
It influences society to prioritize its needs and wants and make decisions about how to use resources.
:D
