Answer :
A main idea is important information that tells more about the overall idea of a paragraph or section of a text. use your browser's BACK button to return. or CLOSE browser window if this is an extra window.
The best way to find the main idea is to read the text and look for repeating phrases. try to look at context clues too. most of the time the topic has been backed up so look for things that support one key point. the title and first paragraph will probably help you the most