Have you LOOKED at the artwork in question???
Do you KNOW what the terms, "Portrait, Still Life, Daily Life, Nonrepresentational" MEAN?
If you can answer "yes" to those questions, your first and third questions are answered. If you said "no" to either of them, you need to first look up the image and study it, and then look up the definition of the words, and see which applies to the image.
Light effects the piece by what it illuminates and emphasizes. Again, you have to look at the work and study it in order to answer the question.
Line is employed in the way it directs your eye around the work, and the directions in which it does so. Hint: it's concentrated on the subject matter, and not the background.