Final answer:
The author's purpose in a text that encourages the reader to believe or do something is to persuade.
Step-by-step explanation:
When a text encourages the reader to believe or do something, the author's purpose is to persuade. The author wants to convince the reader to accept their point of view or take a specific action. This can be seen in persuasive essays, advertisements, and speeches where the main goal is to influence the reader's thoughts or decisions.
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