I am familiar with the text but the question indication a list of values should there. What is it referring to when it says "the following"
<span>1. Early 1990's.
2. Different workers have specific roles and different levels of authority.
3. Richard Bushnell, who attended the University of Utah, enjoyed playing computer games in college.</span>
This a simile. This is because a simile uses like or as to compare two things. A metaphor doesn't use like or as, but it still compares things.