Final answer:
Longitude and latitude lines on the Winkel-Tripel projection are used to organize locations on the Earth. They appear as curved lines for longitude and straight lines for latitude.
Step-by-step explanation:
Longitude and latitude lines on the Winkel-Tripel projection are imaginary lines that help geographers and cartographers organize locations on the Earth. The Winkel-Tripel projection is a type of map projection that attempts to minimize distortion in both size and shape. On this projection, longitude lines appear as curved lines that converge near the poles, while latitude lines appear as straight lines that are evenly spaced.