Based on the map, the areas of sub-saharan africa that are most vulnerable to desertification are a) in the center. b) near the coasts. c) close to deserts. d) in the southern tip.

Which sentence best represents the thesis of this article? a they challenge us to consider whether we can trust what we are seeing. b optical illusions may seem mysterious, but they are not unexplainable. c through science, we can learn how optical illusions work. d let’s take a look at three common optical illusions and explore the science behind each one.

What are policymakers trying to do by using the media to deliver specific messages to citizens?

For an actor, keeping his mind on will ultimately his performance.