Which biologist maintained that a biological ecosystem has a direct influence on the human culture that interacts with it?
julian steward
carl sauer
carl ritter
georg hegel

Julian Steward

Explanation:

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.