Who did isaguras turn to in 508 BC to help him overthrow Cleisthenes

it depends on the situation, but in a definitional sense, irrendentism is more valid.

explanation:

the correct answer is c

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.