What does the reader learn about Doctor Dolittle as a result of the flashback to the time he spent with Polynesia?
Answer: The reader learns that Doctor Dolittle has a unique gift for communicating with animals. During his time with Polynesia, he learns to speak the languages of various animals, including birds, dogs, and monkeys. He also demonstrates a deep respect and concern for their well-being, going to great lengths to help them when they are in danger or distress. This flashback scene serves to establish Doctor Dolittle as a kind-hearted and compassionate character, whose connection with animals sets him apart from other humans.