Which introduction strategy does this passage use Have you ever wondered why penguins do not fly These flightless birds swim rather than fly since their wings have evolved into flippers?

The introduction strategy used in this passage is a rhetorical question. By asking, "Have you ever wondered why penguins do not fly?" the author engages the reader's curiOSity and prompts them to think about the topic before providing information. This technique effectively sets the stage for the subsequent explanation of penguins' evolution and adaptation.