Correct me if I'm wrong but I believe they're called "Prints".
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.)
Explanation:
The term "pixel" is actually short for "Picture Element." These small little dots are what make up the images on computer displays, whether they are flat-screen (LCD) or tube (CRT) monitors. The screen is divided up into a matrix of thousands or even millions of pixels
