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.
Answer:
Spain
Spain was in control of mexico in 1810
<span>The major centers of
knowledge and learning i</span>n Western Europe during 6th and 7th centuries were located in monasteries.
After the fall of the Roman Empire (during the Dark Ages), the monasteries were
used to preserve the medical writings and books of the Greeks and Romans. Until
universities such as Salemo were built, the monasteries were the only centers
of learning.
Islam arrived in sw Asia in a peaceful way through trade and interactions between Muslim merchants and locals. Hope this helps!
