Pick all that apply

• 1Choice 1.

  It's the region not covered by the notch, home indicator, navigation bar, and so on, and you constrain to it with view.safeAreaLayoutGuide

• 2Choice 2.

  It replaced topLayoutGuide/bottomLayoutGuide in iOS 11 because those guides were per view controller and hard to apply to child views deep in the view hierarchy

• 3Choice 3.

  Safe Area insets are fixed values the device decides and can't be changed in code

• 4Choice 4.

  Background colors and full-screen images should fill the whole superview, not the Safe Area

• 5Choice 5.

  The Safe Area only exists vertically (top/bottom) and has no horizontal component