_ are like rivers flowing in the ocean

no

Explanation:

a river is a small body of water that is seperated from the "Ocean"

and the ocean is a Big a.s.s thing of water:)

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.