The correct answer is: C. Celestial pole.
The celestial pole is the point in the sky directly above the Earth’s North or South Pole. It is the point around which all the stars appear to rotate. The latitude of an observer’s position is the angle between the observer’s horizon and the Earth’s Equator. The latitude of the observer’s position is equal to the altitude of the celestial pole.
The North Pole is the northernmost point on Earth. It is located in the middle of the Arctic Ocean. The South Pole is the southernmost point on Earth. It is located in Antarctica. The Pole Star is a star that is located very close to the North Pole. It is the brightest star in the constellation Ursa Minor, also known as the Little Bear.
The altitude of a celestial object is the angle between the object and the observer’s horizon. The altitude of the celestial pole is equal to the latitude of the observer’s position.