Final answer:
The Mass, the Motet, and the Madrigal are forms found in Renaissance music, with the Madrigal being a key secular form known for its polyphonic texture.
Step-by-step explanation:
The Mass, the Motet, and the Madrigal are different forms found in Renaissance music. The madrigal is a secular music form that gained popularity during the Renaissance period, characterized by its use of polyphony and emotional expressiveness. While masses and motets were predominant forms of sacred music, the Italian madrigal was a principal secular form, leading to developments in the musical texture and structure, such as richer harmonies and more intricate parts.