Question

________ is the slight change in how the earth orbits the sun over hundreds of thousands of years. it changes from a slightly circular to more elliptical orbit.
rotation
obliquity
eccentricity
precession

Explanation:

Rotation refers to the Earth spinning on its axis. Obliquity is the tilt of the Earth's axis. Precession is the slow - change in the orientation of the Earth's rotational axis. Eccentricity describes the shape of the Earth's orbit around the Sun, changing from slightly circular to more elliptical over long periods.

Answer:

C. Eccentricity