posted by John .
The bar graph below show the TV viewing habits of Koreans.
What is the part of speech of 'below'? Is 'which is' omitted before 'below'?
English grammar -
The word "below" can be either an adverb or a preposition.
In this sentence, it's an adverb. It's telling WHERE something is.
You could rephrase the sentence to include "which is" where you indicated, but it's not necessary.