Final answer:
The death of Silverton's brother is likely to cause significant changes to his sleep cycle, including troubles with falling and staying asleep, and an increase in stress-induced sleep disturbances.
Step-by-step explanation:
After Silverton discovers the tragic death of his brother, his sleep cycle is likely to change significantly. The immense stress and grief brought on by such a devastating event can lead to a variety of sleep disturbances, including difficulty falling asleep, staying asleep, or experiencing restful sleep. Nightmares and vivid dreams are also common as the mind attempts to process the trauma. Moreover, Silverton might experience an increase in stress hormones like cortisol, which can further disrupt sleep. During this time, Silverton's body and mind need restorative sleep to cope with the emotional burden, but the imbalance in his natural sleep patterns can make getting enough rest challenging.