<span>Ivan pavlov's experiments on the timing of associations demonstrated that two things become associated because one idea changes the value of another idea. They have common features,also occurring at the same time.</span>
The western roman empire was weakened by the high cost of defending the empire.
At its zenith, the Roman empire stretched from the Middle East to the Atlantic Ocean. It being a vast territory, was not easy to govern and due to its vastness the empire faced logistical as well as administrative issues.
Even though they had excellent road systems, the Romans were still not able to effectively manage their territories. They had to struggle in order to maintain enough resources and troops so that they could defend themselves from the rebellions and outside attacks. Emperor Hadrian even constructed a wall in Britain so as to keep the enemies away.
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If I had written your question in English, I could have helped you
Answer:
11. its A
Explanation:
Air moves from areas of high pressure to areas from low pressure