What direction is river A flowing? From south to north From north to south From east to west From west to east

Explanation:

No actual diagram has been provided and none can be found online representing this question. Regardless, Rivers will always from based on elevation from the highest point to the lowest point due to gravity. That being said the vast majority of rivers on average have been found to flow east to west. This does not mean all rivers and varies on the elevation like mentioned before, the Amazon river instead flows west to east.

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.