How should the inclination of the Earth’s axis of rotation to the plane of its orbit be changed so that the Sun becomes a pole star twice a year?

In this case, the axis of rotation of the Earth must lie in the plane of the orbit.

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.