Which of the following best express a sentimental or heartfelt message
a. speech
b. song
c. photograph
d. cartoon

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.

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )