http://youtu.be/l3iXy-I2PEg An allegory is story, poem or picture in which all the elements symbolize something else. Watch the video above to learn more.
http://youtu.be/mhptwwbA5Tc Motifs are repeated elements in a story or poem that work to support the theme.
http://youtu.be/IEeemzAP5A4 The protagonist is the main character in a story. This character is also usually the good guy, otherwise known as the hero.
http://youtu.be/XvhHsRAwDz4 Satire is a story, poem, comedy routine, movie, et cetera, that uses irony, sarcasm, humor, or ridicule to highlight human idiocy or vice with the purpose of advocate for political or social changes. Remember, that satire is not just mean for the sake of being mean. It must have the purpose of changing the status quo...
http://youtu.be/w36ddaXKHeI Subtext is an underlying theme in a literary work that must be inferred by looking at the clues the author leaves, such as repeated symbols, events, etc.
http://youtu.be/pEfIcz8epmE Symbols is literature are objects that stand for something else. Typically, a material object that represents something abstract.
http://youtu.be/qhq82Pv0IUo The theme of a literary work is the dominant idea that the symbols, repetitions and patterns in the work are trying to convey.