Answer:
Explain what selfishness and greed is, and explain why people may have these qualities. Show what selfishness and greed has done in the past to people and how it can affect current people.
Step-by-step explanation:
By explaining what selfishness and greed is, you’re allowing the reader to understand what the rest of the essay is about. By describing how it has affected people in the past and present, you’re showing its relationship with humans.