What is the significance of the Prime Meridian?

The Prime Meridian is significant because it serves as the zero-degree line of longitude, which is crucial in defining the geographical coordinates of locations around the world. By establishing a reference point for longitude, the Prime Meridian effectively divides the Earth into two equal halves: the Eastern Hemisphere and the Western Hemisphere. This division is important for navigation, mapping, and understanding global positioning. The use of the Prime Meridian allows for a standardized way to communicate time zones and geographical positioning globally, which is essential in various fields, including geography, navigation, and international trade.

The other options identify elements that are not accurate representations of the Prime Meridian's role. For example, it does not represent a point of latitude, a high elevation point, or a shipping route. The function of the Prime Meridian lies fundamentally in its role in geography and navigation.