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antonsandiego
I'm certain, the first option is the right one. (sidebar)Headline goes first, as a name of the topic, then it follows by subhead which divide this article on some necessary points. And the last one- banner is frequently poses as "eye-catcher" supported with loud slogans and attractive logo but contains no expanded information.
rahulsharma789888

The term sidebar  refer to the graphical elements which were present at the corner of the screen , and you cant write out of the sidebar  , so they maintain the proper formation.

The correct answer will be A Sidebar contains additional information that helps readers better understand the main story.

Explanation

The term Sidebar were used by the publisher were everything were written so systematically and the content of the word were noted down very nicely so the book can published in correct way .

Sidebar were narrow column and they were appears on the left and right side of the screen and they can we wide and broad too as per need.

For more information on Sidebar , please refer the below link :

https://brainly.com/question/14787476