Question

what do you understand by third world countries?
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Answer 1

Explanation:

What Is Third World?

"Third World" is an outdated and offensive phrase that has been used historically to describe a class of economically developing nations. It is part of a four-part segmentation that was used to describe the world’s economies by economic status. Third World falls behind First World and Second World but was ahead of Fourth World, though Fourth World countries were hardly recognized at all. Today the preferred terminology is a developing nation, an underdeveloped country, or a low- and middle-income country (LMIC).

Answer 2

I think they are the countries that have not devlop yet with high death rate and low birth rate.