A "trio" refers to a group of three individuals or items that are often connected in some way. This term is commonly used in various contexts, such as music, where a musical trio consists of three musicians performing together. Trios can also be found in literature, sports, and other collaborative activities. In mathematics, a trio can refer to a set of three numbers or elements. The concept of a trio is significant in many cultures and traditions, often symbolizing balance and harmony. For example, the Holy Trinity in Christianity represents the unity of the Father, Son, and Holy Spirit as a trio.