Final answer:
The antiphonal singing technique is where a solo voice or leader alternates phrases with a chorus, often used in both ancient and modern poetic and musical compositions.
Step-by-step explanation:
The characteristics where a leader and chorus alternate phrases is typically referred to as antiphonal singing. This can be found in various poetic and musical compositions where a solo voice or leader is answered by a chorus.
This technique, used for dramatic effect and often to emphasize themes or emotions, creates a dialogue between the individual and the group, reinforcing the artistic expression.
Instances of antiphonal singing can be found in ancient Greek tragedy, with Sophocles being noted for integral choral involvement, unlike later poets such as Euripides and Agathon who sometimes used choral songs more as interludes. In more modern contexts, we see a similar pattern of alternation of phrases in speeches, sermons, and songs that can add rhythm, emphasis, and dynamics to the performance.