1. what happens and what results from an earth's precession?

Active precession is a slow and a gravity induced change resulting from the orientation of the planet

Explanation:

The tilting nature of the earth and the bulge associated with the planet due to its rotation occurs as a result of the gradual shift in the orientation of the planet. The precision of equinoxes and solstice is possible due to the elliptical motion of the planet around the sun. This shift cause changes in motion and speed of the earth s the wind motion takes its impact on the northern and southern spheres. The tidal force of the sun and moon are also responsible for the effects seen on the surface. Similarly, this also impacts the flow of energy from the solar system and regulation of the earth's interior energy i.e erosion and deposition in the form of the features found at the surface.