What is the independent variable?

Read the excerpt how the grimm brothers saved the fairy tale. which idea does the author introduce first

Write a five-minute oral presentation about the call of the wild, writing for an audience of your peers. what did you find most fascinating or interesting about the story, and what did you think were its most important points? include one visual element to support your ideas; this may be a short slideshow. then, make small changes to your speech to adapt it to be presented to a formal audience. enter both versions of your speech (informal and formal) in the space below, and include your selected visual element. if possible, present your speech to an audience to receive feedback.

What does the birdcage symbolize in trifles?