What happens to the angle of declination as you get closer to the poles?

The declination becomes very, very variable and unpredictable as you move closer to the poles.

Explanation:

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.