Final answer:
The orange lines called lines of longitude or meridians are moving from west to east on the world map.
Step-by-step explanation:
The orange lines that are moving from west to east on the world map are called lines of longitude or meridians.
Lines of longitude run from the North Pole to the South Pole and help us measure the east-west distance on Earth. The prime meridian, which passes through Greenwich, England, is designated as 0 degrees longitude. The lines of longitude are used to determine time zones and to establish the International Date Line.
Unlike lines of latitude, which are parallel to the equator, lines of longitude intersect each other at the North and South Poles. Each line of longitude represents a different time zone, and as you travel from west to east, the time changes, usually by one hour for every 15 degrees of longitude.