The correct answer should be A. naturalism.
Naturalism is a literary movement which comes from realism, meaning that it is trying to convey realistic images, without the use of poetic language and escapism. Endless melody and grand opera aren't literary movements, and romanticism is quite opposite of naturalism - it emphasizes poetic language and escapism rather than realism.
Harmony
Harmony is the pleasing arrangement of combined, simultaneous musical notes structured according to the composition and progression of chords. With harmony, superposition of sounds are orchestrated into congruent parts. Harmony is the playing together of interacting different notes, delivering rich and colorful music.
Vanitas is a still-life painting style from the 17th century that depicts death with different objects, so D would be the correct answer.
This is called the omniscent narration, in which the one who is being portrayed is the third person. The person usually tells the story in the background or the one who tells the story as the form of the author. They are usually the ones who tells the story or gives the thoughts of the characters or what is going to happen in the film.