Final answer:
The runaway balloon in 'Eleven' symbolizes loss of control, lost innocence, or the fleeting nature of time, similar to themes of freedom, escape, or transcendence in the provided excerpts.
Step-by-step explanation:
The runaway balloon in "Eleven" typically symbolizes the loss of control or grasp on a situation, and it can also represent lost innocence or the fleeting nature of time. This symbolism could be similar to the themes found in the provided excerpts, where balloons and objects in flight represent different notions of freedom, escape, or change. For instance, in one of the texts, the pear-shaped balloon floating aloft could symbolize an elevation above the mundane, providing a broader perspective. Similarly, Klee's Red Balloon, with its upward floating movement against a geometric cityscape, might be interpreted as a metaphor for transcendence or the desire to escape physical limitations, especially considering Klee's own health issues at the time of creation.