Final answer:
Juliek's last act was playing a final piece on his violin according to Elie Wiesel's 'Night'. He plays Beethoven in his final moments, demonstrating music's power to provide comfort and maintain humanity even in dire circumstances.
Step-by-step explanation:
Juliek's last act was a) Playing a final piece on his violin. This moment occurs in Elie Wiesel's 'Night', a work that recounts the harrowing experiences of the author during the Holocaust. Juliek, a fellow prisoner and a musician, uses his final moments to fill the oppressive silence of the concentration camp with the sound of Beethoven, playing on his beloved violin. This poignant act serves not only as a final assertion of his humanity in the face of dehumanization but also as a powerful demonstration of the role of music as a means of solace and resistance amidst unimaginable suffering. Much like how music helped Ji-Hae Park emerge from her depression and realize her purpose to spread the joy of music, Juliek's violin playing was a testament to the profound impact music can have even in the darkest times.