Quiz: Component tree

For the following quiz questions you should try to understand the code and see if you know the answer, but also try running the code (e.g. in CodePen). Some questions will require you to look at the resulting HTML. You cannot do that by looking at the page source, because that only shows the static (declarative) HTML, not what you modified through code. Therefore you need to use Developer Tools which exist in all the modern browsers (under developer tools look for 'Elements' or 'Inspector' tab).