Final answer:
During the Romantic era, instrumental music, including dance music, increased in popularity. This was due to the rise of the middle class and the larger audiences attracted to public concerts and festivals.
Step-by-step explanation:
During the Romantic era, the type of music that also increased was instrumental music. This included dance music, which often had improvised elements and familiar tropes, and was a popular purely instrumental genre. Additionally, the rise of the middle class during this time led to more public concerts and festivals, attracting larger audiences who were willing to pay for the music.