Final answer:
Masses and motets were popular during the Renaissance period in European music. Composers of sacred music adopted secular forms towards the end of the Renaissance. There was an increasing demand for music, aided by the invention of the Gutenberg press.
Step-by-step explanation:
Masses and motets were popular during the Renaissance period in European music. These were principal liturgical forms that endured throughout the entire Renaissance period. Composers of sacred music began to adopt secular forms like the madrigal for their own designs towards the end of the Renaissance. Polyphony became increasingly elaborate in the fourteenth century, while the fifteenth century showed simplification in voices striving for smoothness. The Renaissance period also saw an increasing demand for music, with the invention of the Gutenberg press allowing for wide-scale distribution of music and musical theory.