The clue is in the question.
(Wonder why it's not called the 'Prime Parallel'.)
Once you reason out the answer to this one, you might like
to stretch your logic muscles further with a couple of classic
American brain-teasers:
-- Who is buried in Grant's Tomb ?
-- What color is an orange ?
-- When is the Fourth of July celebrated ?
It is the meridian
The equator is parallel not meridian
equater i think
located on the prime meridian
The only lines that can run parallel to the Prime Meridian on any map are other meridians of longitude, and the only map on which they can be printed parallel to it is a Mercator Projection. They are not really parallel to the Prime Meridian.
parallel
Parallel: 0o latitude
A Parallel of Latitude
no the equater does
The equator is parallel not meridian
equater i think
The lines parallel to the equator are called lines of latitude.
located on the prime meridian
equater
The only lines that can run parallel to the Prime Meridian on any map are other meridians of longitude, and the only map on which they can be printed parallel to it is a Mercator Projection. They are not really parallel to the Prime Meridian.
parallel
Meridian
Nothing is parallel to any meridian. The equator is a parallel of latitude, and is parallel to all the other parallels. This is a big part of the reason that, collectively, they are called 'parallels'.