Final answer:
Open doors in the provided texts symbolize transitions to new realities and confrontations with consequences, paralleling themes of danger, neglect, and escape.
Step-by-step explanation:
The text refers to different contexts where doors are left open, symbolizing either neglect, escape, or entrance into another state of being or world. Given the various stories, it suggests characters are confronting the consequences of their actions or decisions. In one case, George Hadley ignores the dangerous fixation of his children with the African veldt in the nursery, leading to dire consequences. Similarly, the situation in the 'zoo of death' alludes to a character being troubled by the proximity of danger and the fear that it poses. The repeated theme is the tension and ominous presence that these open doors signify. The concept of the door conveys a passage to a new reality, which could be both enticing and dangerous, indicating a deeper dive into life's complexities and a confrontation with its consequences.