According to the present understanding, on which of these objects in this planetary system is it LEAST likely that life exists or existed at an earlier time?

Question

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Io, a moon of Jupiter, is the least likely place for life to exist or have existed due to its extreme volcanic activity, which creates a very inhospitable environment. This constant volcanic activity is driven by tidal heating from its interaction with Jupiter and other moons, making it one of the most geologically active bodies in the Solar System. This environment is not conducive to life as we understand it.

According to the Present Understanding, on Which of These Objects