Final answer:
The correct term for repeating entire lines of music, as seen in Josquin's "Ave Serena," is 'Bis.' The term means that a section or line of the music should be repeated immediately.
Step-by-step explanation:
When entire lines are repeated in a piece of music, this technique might be referenced using various terms based on the context of the repetition. In the context of Josquin's "Ave Serena," the correct term for repeating entire lines is Bis. The options A' capo and Da capo refer to instructions in sheet music indicating that from a certain point, the performer should repeat the music from the beginning (capo meaning 'head' in Italian). Coda, on the other hand, signifies a concluding passage or section which is added to the end of a musical work, often to give it closure. The term Bis is used when a section of music, or in this case, a line, is to be repeated immediately.