What is the main idea of a story about a girl who learns to read with the help of her cat?

In a story where a boy saves his village from a flood by alerting everyone, what is the main idea?

What is the main idea of a book where a family learns to grow a garden together?

In a story about a dog who helps a lost kitten find its way home, what is the main idea?

What is the main idea of a story about a girl who plants a tree in her backyard and watches it grow over the years?

In a book where a young boy learns to ride a bike with help from his older sister, what is the main idea?

What is the main idea of a story where a penguin makes friends with a seal in the arctic?

In a tale where a young inventor creates a machine that cleans the ocean, what is the main idea?

What is the main idea of a book where a girl uses her allowance to save abandoned animals?

In a story about a boy who builds a treehouse with his friends during summer vacation, what is the main idea?