Final answer:
The two factors that combine to form an author's purpose for writing a text are audience and message.
Step-by-step explanation:
The two factors that combine to form an author's purpose for writing a text are audience and message. The audience refers to the intended readers or viewers of the text, while the message is the main idea or the information that the author wants to convey through the text. These two factors influence the decisions an author makes regarding the tone, word choice, and overall structure of the text.
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