Which factor will likely have the greatest influence on Japan’s demographic changes between now and 2050?

A. technological changes
B. food production
C. natural resources
D. healthcare needs
E. social customs

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.