Which type of metamorphosis do fleas undergo?

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Fleas undergo complete metamorphosis, which is characterized by four distinct life stages: egg, larva, pupa, and adult. This type of metamorphosis involves significant changes in form and function at each stage. After the flea eggs hatch, the larvae emerge, which are very different in appearance and habits compared to the adult fleas. The larvae then develop into pupae, entering a cocoon stage before finally emerging as adult fleas. This process allows fleas to exploit different environments and food sources during their life cycle, enhancing their chances of survival and reproduction. The reliance on these varied life stages is a hallmark of complete metamorphosis, distinguishing it from other types of metamorphosis where the transformation is less pronounced.