Answer:
As Lady Macbeth, I must confess that my downfall was primarily caused by internal forces. It was my own guilt and inner turmoil that ultimately consumed me. In Act V, Scene V, as I sleepwalk and try to wash the imaginary bloodstains from my hands, I exclaim, "Out, d***** spot! Out, I say!" This line is a clear indication of my internal struggle as I try to rid myself of the guilt and remorse that is eating me alive. Furthermore, my eventual s**cide is a testament to the fact that my downfall was caused by my own internal demons, rather than any external forces. As I state before my death, "All the perfumes of Arabia will not sweeten this little hand," I am acknowledging that my guilt is something that cannot be washed away, no matter how much I try. Therefore, while external forces such as Macbeth's ambition and the witches' prophecies played a role in our downfall, it was ultimately my own internal struggles that led to my tragic end.