NASA is developing Robotic eel to explore the icy water on which of the following moons?

NASA is developing Robotic eel to explore the icy water on which of the following moons?
[A]Europa
[B]Titan
[C]Callisto
[D]Io

Europa
NASA is developing a ‘robotic eel’ that could explore the icy water of Jupiter’s moon Europa. This rover would resemble an eel with a short antenna on its back that harvests power from locally changing magnetic fields. The goal is to enable amphibious exploration of gas-giant moons like Europa. Reference


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