Which group is least likely to be
affected by smog?
a. healthy young adults
b. healthy older adults
c. healthy children
d. people with asthma

answer; (b); i believe its indefinite existence of human population in a healthy and prosperous condition;

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.

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.