Final answer:
Acceptable reasons for using direct quotations in writing include clarification or emphasis, representing an opinion or idea, and adding authority or interest to a statement.
Step-by-step explanation:
There are several acceptable reasons to include direct quotations in one's writing:
To clarify or emphasize a point: Direct quotations can be used to provide specific evidence and make a statement more clear or impactful.
As a representative statement of an opinion or idea: Direct quotations can be used to accurately convey someone's opinion or idea.
As a voice that adds authority or interest: Direct quotations can be used to add authority or interest to an assertion that one makes.