You use the __________ pseudo-class to apply styles to elements that do not have therequiredattribute.

A structure that has a(n) ______________ is not a tree.

A. cycle B. node C. edge D. leaf

Figure 5-21 is an example that’s not well aligned. Explain what you would do to improve the alignment. It may be helpful to create a photocopy of the example and draw on it.