When a country is not able to produce a good more efficiently than other nations, but produces the good more efficiently than it does any other good, it is said to have a(n) in that good.
absolute advantage
resource advantage
first-mover advantage
comparative advantage

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.