What theory argues that an asteroid that crashed into the earth near the yucatan peninsula caused the k-t extinction?
a. alvarez theory
b. descent theory
c. isthmus theory
d. vestige theory

because there are alot of mountains

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.