What is a developed nation? A. a nation working hard to increase its gross national income
B. a nation working hard to support its citizens and develop business
C. a nation that has made major social, political, and economic progress.

a nation that has made major social,political,and economic progress.

C. a nation that has made major social, political, and economic progress.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.