Here are the answers to your questions:
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Which of the following regions can be classified as a functional region?
Answer: Silicon Valley
(A functional region is defined by a specific function or activity, such as economic activities, and Silicon Valley is known for its tech industry.) -
What is the name of the event that has increased the rate of cultural diffusion since the 1980s?
Answer: globalization
(Globalization has facilitated the rapid exchange of ideas, products, and culture across the world.) -
How do the activities of Boko Haram in Nigeria demonstrate the ability for culture to link or divide a country?
Answer: These activities show how religious radicalization can be a centrifugal force.
(Boko Haram's activities highlight how extremist ideologies can create division and conflict within a nation, showcasing the centrifugal effects of culture.)