Answer:Sure, whats your question.
Answer:
because it allows an artist to use one or more images to replace another, in order to convey a message or idea. captures the meaning and importance of a subject through visual representation instead of words.
Using all of it at times and only small parts of it at others..... not fully certain
Answer:
If you stretch it out you are making it wider or larger making the image I. the photograph more skinny (if it is taller) or fatter (if wider.)