Final answer:
In the book 'Every Falling Star,' Adeul's father was unable to come back for him and his mother because he was involved in a criminal organization and feared for their safety. This left Adeul and his mother alone to navigate their difficult circumstances.
Step-by-step explanation:
In the context of Every Falling Star, Adeul's father was unable to come back for him and his mother due to circumstances that were likely fraught with danger, distress, or impossibility.
However, by thematically analyzing texts with similar motifs, we can infer that familial separation in literature often stems from external pressures such as social stigma, political issues, or life-threatening dangers that prevent a parent from returning. It's a common narrative element used to explore the emotional depths of characters who are faced with abandonment or the loss of a dream.