How does the speed of rotation affect the shape of the earth?

Explanation:

The rotation affects the shape of the earth because it causes the bulge at the equator and the flattening at the pole.

The earth has a spherical shape and this owes more to its internal composition.

d is the logical answer but im not a 100% sure

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.