Serpent mound and spiral jetty are known as earthworks. true or false?

For a theatrical production, the comes up with the sound plan, and the makes the plan a reality. sound board operator; sound engineer sound designer; sound engineer sound engineer; sound tech sound tech; sound board operator

Which of the following statements is not true? like haydn and many other composers of the classical period, beethoven was most successful financially when in the service of the aristocracy. the finale of beethoven's ninth symphony is based on schiller's poem about human brotherhood, ode to joy. beethoven opened new realms of musical expression that profoundly influenced composers throughout the nineteenth century. in the finale of his ninth symphony, beethoven took the unprecedented step of using a chorus and four solo vocalists.

What instrument was developed during the early modern period of the twentieth century