Direction refers to the course on which something moves or points. Animals have excellent sense of direction, including birds and salmon. Maps, compasses, Sun, and GPS help navigate
Sunrise/sunset positions indicate direction: east is front, north left, south right, west behind. Sun's shadow movement can be used to determine east-west direction. Vegetation patterns help determine direction: denser foliage on south side of trees. Watch alignment with sun helps find direction: south halfway between 12 and hour hand
Ancient humans learned to determine direction based on Sun's position. Earth's poles are opposite points where Earth's axis crosses surface. Sun's position varies by latitude due to Earth's tilt