My art teacher told me to add details to the background space to give it an atmosphere in the negative space. Well, I have no idea what to draw for details in the background space. What should I draw in the background space?

Also, the 1st picture attached is my teacher's example. The details that she added were clouds.
The second picture is my example, it doesn't have any details in the background space yet. (sorry if the quality of the picture is bad)

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.