Which movement did George Whitefield contribute significantly to in America?

George Whitefield made significant contributions to the Great Awakening, a religious revival that swept through the American colonies in the 18th century. This movement emphasized personal piety and an emotional approach to worship, which was a departure from traditional, more formalized practices of religion at the time.

Whitefield’s powerful preaching and ability to draw large crowds transformed the landscape of American Christianity. He encouraged a more personal relationship with God and inspired many to seek spiritual rebirth. His open-air sermons promoted a visionary, evangelical fervor that galvanized the church and helped to unify various denominations under the shared experience of revival.

The other movements mentioned do not align with Whitefield's primary role or influence. The Second Awakening occurred later in the 19th century, the Reformation Movement was centered in Europe during the 16th century focusing on challenges to Catholicism, and the Holiness Movement arose from the Methodist tradition in the late 19th century, focusing on sanctification and holy living. Thus, the context of Whitefield's contributions firmly places him within the Great Awakening, making it the correct choice.