Respuesta :

Thea headings and subheadings of the body of an outline should be parallel.
They don't really have to be long and complicated, and of course, interesting.

I believe the answer is: Parallel


Here is an example of parallel placement:



HEADING


     SUBHEADING


The purpose of such arrangement is to ensure that the readers understand that the information that written in the subheading is a part of the heading as a whole. Also, from aesthetical point of view it make the writing become much more convenient to read.