Answer:
The sun tends to rise from the eastern direction always and sets in the western direction. In the northern hemisphere, during the noontime, the sun reaches the center of the horizon and is directed towards the southern side. This means that when a person faces the sun at noon, by walking directly towards it, then it will let him move in the southern direction.
Thus, If one walks with the sun at his/her back, then it means that he/she is heading towards the north. Whereas, if a one moves with the sun at his front, then this means that the person is heading towards the south. The opposite case arises in the Southern Hemisphere.
In the northern hemisphere, the shadow moves from the western to eastern direction, and it points the north direction at noon. In the southern hemisphere, the shadows indicate the south direction at noon.
