Answer:
0 ° latitude, at the equator
Explanation:
Given the Earth's spherical shape, the North Star, Polaris can be observed relative to the horizon. Its position is dependent on the observer's location; so, the angle between Polaris and the northern horizon corresponds with latitude.
Latitude is a point's coordinate relative to its location in a north-south position. As an observer on a ship, the North Star, would appear closest to the horizon when viewed at the equator, thus, since the angle between the northern horizon and Polaris is approximately zero, the coordinate is 0° latitude.
