Question

what line creates the eastern and western hemispheres? lines of longitude equator lines of latitude prime meridian

Explanation:

The Prime Meridian (0° longitude) and its opposite line (180° longitude) divide the Earth into the Eastern and Western Hemispheres. Lines of longitude are a set of lines, not a single dividing line; the Equator and lines of latitude split the Earth into Northern and Southern Hemispheres.

Answer:

Prime Meridian