Answer:
The main or central idea of the story "The Starfish" is the significance of making a difference, even in the face of seemingly insurmountable challenges. The story conveys the message that individual actions, no matter how small, can have a positive impact on others and the world. The boy's act of throwing starfish back into the ocean, despite the vast number of starfish and the skepticism of others, reflects the idea that every effort counts and can make a meaningful difference to someone in need. This story highlights the importance of compassion, empathy, and the belief that even one small act of kindness can matter profoundly.
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