Which of his musical styles did Antonin Dvorak use to compose his Symphony no 9?

Antonin Dvořák's Symphony No. 9, commonly known as the "New World Symphony," incorporates elements of Folk Music, particularly inspired by African American spirituals and Native American melodies. This blend reflects his interest in American music and culture during his time in the United States. The symphony also showcases Dvořák's mastery of Romantic orchestration and form, combining traditional European classical techniques with American musical idioms.