The fact that at any time during the year, the earth's axis is parallel to its orientation at all other times is called its parallelism, or .

Polarity

Explanation:

Polarity -

It is also known as parallelism .

It refers to the condition , when the axis of the Earth becomes exactly parallel to the former position , as the Earth revolves arounds the Sun ,

Hence , this type of orientation is referred to as parallelism or polarity .

Hence , from the given information of the question ,

The correct term is polarity .

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.