Consider the following statements:

[Physical Geography]

Statement I: Scientific studies suggest that a shift is taking place in the Earth’s rotation and axis.

Statement II: Solar flares and associated coronal mass ejections bombarded the Earth’s outermost atmosphere with tremendous amount of energy.

Statement III: As the Earth’s polar ice melts, the water tends to move towards the equator.

Which one of the following is correct in respect of the above statements?

The correct option is: Both Statement II and Statement III are correct but only one of them explains Statement I.

Let us analyze each statement step-by-step to understand the logic behind this correct option:

Analysis of Statement I:
Scientific observations and satellite data (such as from NASA's GRACE mission) have confirmed that there is indeed a shift taking place in the Earth’s rotation axis (polar drift). The distribution of mass on and within the Earth determines how the planet rotates. Any significant redistribution of mass will shift the axis of rotation. Therefore, Statement I is correct.

Analysis of Statement II:
Solar flares and coronal mass ejections (CMEs) release massive amounts of solar energy and charged particles. When these interact with the Earth's magnetosphere and upper atmosphere (particularly the thermosphere and ionosphere), they deposit a tremendous amount of electromagnetic and kinetic energy, leading to geomagnetic storms and heating of the outermost atmospheric layers. Therefore, Statement II is correct.

Analysis of Statement III:
Due to global warming, polar ice sheets and glaciers are melting rapidly. This water flows into the oceans and, due to the centrifugal force generated by the Earth's rotation, redistributes primarily towards the equatorial regions. Therefore, Statement III is correct.

Determining the Explanatory Relationship:
Now we examine which of the correct statements (II or III) explains the axial shift described in Statement I:
1. Does Statement II explain Statement I? While solar flares deposit immense energy into the upper atmosphere, causing it to expand and increasing drag on low-orbit satellites, they do not cause a significant or permanent redistribution of the Earth's solid/liquid mass. Thus, they do not explain the shift in the Earth's rotational axis.
2. Does Statement III explain Statement I? The melting of polar ice sheets and the subsequent migration of water mass towards the equator represents a major redistribution of mass on the Earth's surface. Just like a spinning figure skater extending their arms, moving mass away from the rotation axis (from the poles to the equator) changes the Earth's moment of inertia, directly causing a shift in its rotation axis and speed. Thus, Statement III directly explains Statement I.

Conclusion:
Both Statement II and Statement III are scientifically correct, but only Statement III explains the axial shift mentioned in Statement I. Therefore, both Statement II and Statement III are correct but only one of them explains Statement I.