I believe that finding the balance of drones would be putting a limit on how many drones a country can use at one time. I'm not sure on the other 2 questions.
Arkansas river that’s the answer
Many experts believe that the decline of the ancient Aryan civilization was caused by environmental changes. Another theory suggests that a sharp rise in the Aryan population led to the decline.
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Answer:
all you have to do is create a 3d dimensional object to draw what you learned whats the problem
Explanation:
