Which planet does the moon named Io orbit?

Io is a moon that orbits the planet Jupiter, making it one of the largest of the Galilean moons. It is particularly notable for its volcanically active surface, which is the most geologically active body in the Solar System. The unique features of Io, such as its numerous volcanoes and striking colors due to sulfur and other materials, provide important insights into the geological processes that can occur on moons around gas giants like Jupiter. Understanding Io's orbit around Jupiter also helps in comprehending the dynamics of the Jovian system, including its interactions with Jupiter's immense gravitational field and the effects of tidal heating, which drive its volcanic activity.