I assume that your question would be ''What is the dominant element of Romantic music''
The most dominant element of Romantic music was expressive melodies that are singable and that are giving a great atmosphere. Such as literature, the music, and the melodies were dramatic and emotional. Inspired by nature, poetry, and love.
Some of the Romantic composers are Puccini, Tchaikovsky, Elgar, Faure, Strauss, and Mahler. Examples of instruments that are used in this kind of music are piano, guitar, violin, and others.