Answer:
A. to show that cleaning the room will be a huge task.
Step-by-step explanation:
We do not know what poem this is referring to, but this poet uses a simile or metaphor. This is a type of figurative language and is not meant to be "taken literally." This rules out options C and D because there is not an actual elephant.
While B could still be an answer, the narrator could have cleaned up their room once before without it feeling like a big task. Since they chose to compare it to an elephant specifically, we can guess that the answer will be "A. to show that cleaning the room will be a huge task."