The most important action the governments of north africa and southwest asia could take to improve regional stability would be to

decrease multiculturalism
increase access to social services
increase extremism
reduce regional trading alliances

The most important action the governments of North Africa and Southwest Asia could take to improve regional stability would be to increase access to social services. The correct option among all the options given in the question is the second option. I hope the answer helps you.

What exactly do you mean 

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