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
brainly.com/question/2684713
#SPJ1
ANSWER: 4. A decrease in the average yearly rainfall