Which statement is true of earth's poles?

Earth has two poles North and South they are considered as the two corners of earth.

Explanation:

The imaginary i.e equator or zero degrees, the line divides the equator into two parts of North and South zones named as Poles. Seen as ends of the earth and composed of Positive and Negative physical properties.  

Located at a 90 degree to North and South of the geographic equator. Generating magnetic fields. these have formed by the earth rotation and form a part of arctic and antarctic circles cover from 60 to 90 degrees on both the hemispheres.  

The poles are a window of earth past, many times also here have been shifts in the history of the earth poles and they have shifted earlier in the north pole was located over Canada, and the south pole was near South America. Alfred Wegener in his plate tectonic theory also mentioned the polar wandering forces.

the rub-al-khali is also known as the arabian desert and the "empty quarter"