one way to brainstorm a topic for an informative essay is to\n○ decide the purpose for writing the essay.\n○…

one way to brainstorm a topic for an informative essay is to\n○ decide the purpose for writing the essay.\n○ present an opinion on a topic.\n○ use prior knowledge about a topic.\n○ provide supporting details for the essay.
Answer
Brief Explanations:
Brainstorming for an informative essay often involves drawing on prior knowledge about a topic to generate ideas. Deciding the purpose comes later in the writing - process, presenting an opinion is for an opinion - based essay, and providing supporting details is also a later - stage activity.
Answer:
use prior knowledge about a topic.