What animal is BEST adapted to life in a grassland biome? *

some animals, such as bison ,have broad, flat topped teeth and digestive systems especially adapted to feed on grass.

Hoped that helps.

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.