Answer :
First World countries are industrialized, capitalist nations.
The "Cold War" era was a political constellation of countries with opposing worldviews. On one side were the Western Bloc, or the industrialized capitalist nations affiliated with the United States, which likes to refer to itself as the "Free World" or the "Western World."
What are 1st 2nd 3rd and 4th world countries?
The First World refers to countries that supported NATO and capitalism, the Second World to countries that favored communism and the Soviet Union, and the Third World to those that were not actively connected with either side.
The phrase "Fourth World" was introduced by Shuswap Chief George Manuel in the early 1970s to refer to widely unknown countries (cultural groups) of indigenous peoples, "First Nations," residing within or even across national state boundaries.
Thus, First World countries are industrialized, capitalist nations.
For more information about First World refer to the link:
https://brainly.com/question/15710213