In the geographic coordinate system, which way do parallels run?

In the geographic coordinate system, parallels refer to lines of latitude that run east-west around the globe. These lines are important for defining the position of locations in relation to the equator, which is the primary parallel at 0 degrees latitude. Each degree of latitude is measured as an angle north or south from the equator.

Understanding the orientation of parallels is essential for navigation, mapping, and geographic information systems, as it helps in accurately determining locations on the Earth's surface. Parallels facilitate the division of the Earth into various latitude zones (like tropical, temperate, and polar), each with distinct climatic and environmental characteristics. This foundational knowledge is key for anyone involved in search and rescue operations, as it enhances situational awareness and improves coordination during missions.

Other directions such as north-south would describe meridians (lines of longitude) rather than parallels, which is why that option is not correct. The diagonal and vertical orientations do not accurately represent how parallels are organized within the geographic coordinate framework. Thus, the understanding that parallels run east-west is crucial for effective navigation and mapping.