The correct option is Bulge at the equator.
Explanation
The "Polar-fleeing force" (also known as Polflucht) is a concept originally proposed by Alfred Wegener in his Continental Drift Theory. It was suggested as one of the forces responsible for the movement of continents.
Analysis
- The polar-fleeing force is directly linked to the rotation of the Earth.
- The Earth is not a perfect sphere; it is an oblate spheroid. This shape is characterized by a bulge at the equator and flattening at the poles.
- This equatorial bulge is caused by the centrifugal force generated by the Earth's rotation on its axis.
- Wegener hypothesized that this force caused continental masses to drift away from the poles towards the equator.
- While modern Plate Tectonics has largely superseded Wegener's specific mechanisms, the association between the polar-fleeing force, Earth's rotation, and the equatorial bulge remains a standard concept in physical geography.
Key Takeaway
The Polar-fleeing force relates to the rotation of the Earth, which causes the Earth to bulge at the equator due to centrifugal force.