What rhythmic device did Ludwig van Beethoven use in the opening section of second movement his symphony No7 to create musical unity?

The rhythmic device Beethoven used in the opening section of the second movement of his Symphony No. 7 to create musical unity is called a rhythmic ostinato. A rhythmic ostinato is a short, repeated rhythmic pattern that is used throughout a composition to create a sense of unity and continuity. In the second movement of Symphony No. 7, the rhythmic ostinato is based on a dotted rhythm that is played by the lower strings and bassoon. This rhythmic pattern is repeated throughout the movement, and it helps to create a sense of unity and cohesion.