Question

To summarize the central idea in a text, readers should identify the topic and then identify

little-known facts about the topic.
the author's opinion about the topic.
other readers' opinions about the topic.
scientific facts about the topic.

Answer 1

the author's opinion about the topic.

Explanation: the central idea (main idea) is what the author wants to convey about the topic, so after identifying the topic you determine the author's main point or stance.