please i need help on this homework ? Economics

Note the response for the Rosling Video on “200 countries and 200 years of economic growth” . You can view that video by doing a Google search on “Rosling Video on 200 countries and 200 years of economic growth” You need to answer the question of

what were the main economic concept characteristics that allowed those countries that became wealthier and healthier in the video to do so.You don’t need to summarize the article to answer the question posed above.

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