What is the definition of "true north"?

The concept of "true north" refers specifically to the direction that points directly to the geographic North Pole, which is the point at 90 degrees north latitude on the Earth's surface. This understanding is crucial for navigation and map-making, as true north is a fixed point that does not change, unlike magnetic north, which can vary due to the Earth's magnetic field.

True north is typically represented on maps, and understanding this concept is important in navigation and orienting oneself in relation to the Earth’s geography. The other options, while related to navigation, do not accurately define true north. For example, magnetic north varies over time and location due to shifts in the Earth's magnetic fields, making it distinct from the fixed point of true north. The method of navigation using the stars and the concept of a location in the northern hemisphere, though relevant to navigation, do not capture the specific definition of true north as the direction towards the geographic North Pole.