The correct answer is B.
A song is a short poem or a set of words that is meant to be sung. Most songs express a sentimental message and most used message in songs is the message of romantic love. A purpose of a song is to express the singer's feelings and to relate these feelings to the listeners. The listeners should identify themselves with the feelings in the song, thus creating a kind of connection with the singer. Most songs are heartfelt because they describe a real experience or an experience that is common to many.
A speech is fact-based and rather not sentimental, a photograph can express a heartfelt message but it is extremely subjective. A cartoon is use to describe an occurrence, often a humorous one.