What about the narrator in "top of the food chain advance the story's theme about careless decision making?

His unreliability

Explanation:

In the story "Top of the Food Chain," the most obvious character trait that the narrator has is that he cannot be trusted to make decisions that benefit him. He is unreliable in this sense. Even though the consequences of his actions are terrible, and they lead to unintended effects in humans, the man's arrogance makes him unable to inform his future planning.

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