The organization of a poem can influence the reader's take on the theme, depending on how (in which order) the author presents the information.
Couplet = couple = 2 lines
Quatrain = quadruple = 4 lines
Sestet = 6 lines
Octave = octagon = 8 lines
Thats how I try to remember it.
Clause Definition:
A part of a sentence that contains a verb.
( Basically it has to do with grammar.)
The answer is : Frost, Frost will cling on things to make it white so there for make it look cold