In a group discussion on the shape and size of the Earth, three students made different statements. Let`s analyze each statement to determine which student(s) is/are correct.

1. Student 1: The shape of the Earth is basically an oblate spheroid.

This statement is correct. The Earth is not a perfect sphere but is slightly flattened at the poles and bulging at the equator, making it an oblate spheroid.

2. Student 2: The polar diameter of the Earth is more than the equatorial diameter.

This statement is incorrect. The polar diameter of the Earth is actually slightly smaller than the equatorial diameter. The Earth is wider at the equator due to the centrifugal force caused by its rotation.

3. Student 3: The bulge along the equatorial region is due to the revolution of the Earth.

This statement is incorrect. The bulge along the equatorial region is not due to the revolution of the Earth but rather due to its rotation. The centripetal force caused by the Earth`s rotation leads to the bulge at the equator.

Based on the analysis, only Student 1 is correct in stating that the shape of the Earth is basically an oblate spheroid. Therefore, the correct