The correct answer is A) expressive harmony and melodies.
Romanticism is a style of music, like the poetry of the same period, characterized by expressive harmony and melodies.
The Romantic period of music is considered to be from 1830 to 1900. The composers of Romanticism left the Classical approach behind and let creativity and emotion were used as part of their compositions. Great composers such as Wagner, Shubert, Chopin, Weber, Schumann, Liszt, and Berlioz created expressive harmonies and melodies and new expression forms such as nocturne and rhapsody.