Is it true or false that almost two decades after the fall of communism a number of eastern european countries are still struggling to establish a stable democracies

Yes, the answer that you are looking for is true.

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.