Answer: Polyphony
Explanation: Polyphony is when multiple melodic lines are simultaneously playing.
The identified part represents an open string!:)
It basically means to spoil carefully laid plans, For example;
"Don't upset the apple cart by revealing where we're going."
Bartok was inspired by Stravinsky’s work to put a more traditional and often Baroque forms in pieces of his “middle period” such as Cantata Profana and Music for Strings, Percussion, and Celesta. <span>Stravinsky’s influence waned after the rise of postwar serialism. Messiaen used techniques that were clearly Stravinsky-like, though, such as melodic fragments of different metrical lengths repeating themselves and intersecting in different ways.</span>