Over water surfaces, the potential evaporation than the actual evaporation. a) greater than b) about the the same as c) less than

(b) about the same as

Explanation:

Over the the water surface the potential evaporation is same as the actual evaporation. Evaporation is nothing but vaporization which takes place on the surface of liquid as it changes into gases phase. It is a process in which the liquid phases changes into gases phases on the water surface.

from above discussion it is clear that the potential evaporation is same as actual evaporation.

so option (b) will be the correct option

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.