One voice singing alone would be an example of what type of music

Answer 1

A single voice singing alone is often referred to as a "solo." This can be a part of various musical genres, but it is commonly associated with classical music, folk music, and certain styles of pop or jazz. In classical music, a solo vocal performance might involve a specific type of work, such as a song, aria, or art song. In other styles, it could range from a singer-songwriter performance to a solo vocalist in a jazz setting.