"Developing countries" sounds like it might be a better choice. On the surface, it seems accurate. We're writing about countries that need to develop better health care systems, better schools, better ways to bring water and electricity to people.
"Developing countries" sounds like it might be a better choice. On the surface, it seems accurate. We're writing about countries that need to develop better health care systems, better schools, better ways to bring water and electricity to people.