What does the title of the book, Bird by Bird, mean and how does it apply to writing?

Just take it bird by bird.” ... The fact that Lamott chooses the phrase “Bird by bird” as the title of her book is a tribute to her father, and his influence on her. Not only was he a writer who encouraged his daughter's own writing, but also he was the inspiration for her first book after falling ill with brain cancer.

Explanation:

3 is blunder, i’m not sure about the last one but the first two look correct

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