What does the main idea refer to in a reading passage?

The main idea of a reading passage refers to the central thought or message that the author is trying to convey. It encapsulates the primary point or concept that the text discusses, allowing readers to grasp the essential theme or argument being presented. Understanding the main idea is crucial for comprehension, as it helps readers focus on the key information and insights within the passage. This understanding enables them to summarize the text effectively and engage thoughtfully with its content.

The other choices relate to different aspects of reading and literacy. Substituting a word in text pertains to language flexibility and vocabulary knowledge, while identifying individual letters and making connections between sounds and letters are foundational skills in early literacy, focusing more on decoding and phonics than on comprehending the overall message of a passage.