Final answer:
The question relates to distinguishing between monophonic and polyphonic music. Monophonic music, like Gregorian chant, has a single melody, while polyphonic music features multiple independent melodies. Depending on what is heard, the correct answer could be option b (polyphonic) or option d (monophonic).
Step-by-step explanation:
The question 'What is likely true about what you hear?' asks you to identify what kind of music or literary form is being described based on certain characteristics. In the context of Medieval music, it is important to note the distinction between monophonic and polyphonic textures. Gregorian chant is a prominent form of early medieval music that is monophonic, meaning it has a single melodic line without any harmonic support or accompaniment.
As music evolved during the high medieval era, polyphonic music became prevalent, particularly from the late thirteenth century onwards. Polyphony features multiple independent melodic lines sung or played at the same time, creating harmony and counterpoint. This was further developed during the Renaissance when polyphony and the use of intervals like the third became a defining feature of music.
Knowing these historical contexts helps to identify the type of music being described. If the description suggests a single melodic line, it is likely Gregorian chant, hence monophonic (option d). If it suggests multiple voices or instruments working independently, it is likely polyphonic music (option b). Without a specific text or listening example, referring to lyric poetry (option c) may be irrelevant unless there is mention of poetic elements or structures.
Therefore, based on the provided information, if what you hear has multiple voices or sounds in harmony, the correct answer is likely b. this is polyphonic music. If it has a single melodic line, it would be d. this is monophonic music.