Answer:
Useful
Explanation:
Useful is a positive adjective used to describe someone- for example.
"she is so useful"
The central idea talks about the main focus of that article.
<h3>What is Central idea?</h3>
Central idea in an article is what the article is all about.
It could be an article about a particular disease that is prevalent where the occuring disease is the central idea.
Therefore,
The central idea talks about the main focus of that article.
Learn more on central idea below
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Image. Like, the way that cold red dripping popsicle forms an image in your head.
Well there is many more then 13 but its capitals