The earth rotates around its axis. As a result, centrifugal forces arise. Therefore, the globe is slightly flattened at the poles.
Firstly, it has an uneven surface
Secondly, because of its rotation, our planet is slightly flattened at the poles: the distance from the center of the Earth to the equator is 6378 km, and to the poles – 6356 km
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.