Final answer:
Symphonies were one of the greatest contributors of the Romantic period.
Step-by-step explanation:
The greatest contributors of the Romantic period were symphonies. In the Romantic era, composers such as Brahms, Tchaikovsky, Schumann, and Schubert focused on expressing emotions and individuality in their music. They expanded on the traditions of the Classical period and created symphonies that were larger in scale, incorporating more instruments and exploring a wider range of emotions. The Romantic period is known for its expressive and dramatic music.