Question

What is the name of the invisible line that runs
down the center of the axial region?

Answer 1

An axis is an invisible line around which an object rotates, or spins. The points where an axis intersects with an object's surface are the object's North and South Poles.

Step-by-step explanation:

The Earth's axis is represented by the red line. The white circle represents axial precission, the slow "wobble" of the axis.