Explain how the ozone layer helps the Earth and humans.

The atmosphere acts like a multi-layer shield that protects Earth from dangerous solar radiation. Ozone is found in two different parts of our atmosphere. The stratospheric ozone layer absorbs ultraviolet UV radiation, preventing dangerous UV rays from hitting Earth's surface and harming living organisms.

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.