Acomposition that presents a musical idea in one voice then immediately presents it in a second voice is using a compositional technique called

A composition that presents a musical idea in one voice then immediately presents it in a second voice is using a compositional technique called IMITATION.

Imitation in music is defined as the repetition of a melody in two or more simultaneous texture shortly after its first appearance in a different voice. The melody may vary but it will still retain its original character.

Asunday afternoon conveys a meaning of ritual