They killed him, Diego! I don't know how they did it, but they killed your brother!" I dropped the smartphone and its screen shattered as it hit the ground. My Mother's frantic voice was still coming out of the speaker, but I did not hear her. My brother was dead. My stupid invincible brother, who had survived buildings collapsing on him, trucks crashing into him, and tanks rolling over him, was dead. I wasn't prepared for this. No one could be prepared for this. Sure, everyone knew there were just as many supervillains as superheroes in this world, if not more, but I didn't think the villains would win. I never thought they could defeat the likes of Ultraguy or Lady Dervish or MacWolfen. I definitely did not think anyone could defeat my brother, the hero known as impervious. I wracked my brain, trying to figure out if Javier had ever mentioned having a weakness. The likelihood that he was killed by some sort of alien technology was roughly zilch. Even though the comics had come to life with the appearance of super-powered humans over a decade ago at the turn of the century, the science fiction of extraterrestrial life was still just that: fiction As long as I could remember, Javier had been a picture of perfect health. He wasn't just invincible on the outside, his insides seemed immune to damage or infection as well. He'd never been sick, never gotten so much as a scratch from crashing his bike, and never broken a single bone. I don't know how anyone could hurt him, more less kill him. He'd even survived being at ground zero of a nuclear detonation. Horror washed over me as I was shaken from my thoughts by a terrifying realization: what powerful evil could we be facing that could defeat my brother? Even worse, if impervious couldn't beat it...who could? Which of the following items does Diego rule out as being impervious weakness? a. Psychic attack b. Radio waves c. Infection d. Water