Answer:
Lo moon.
Step-by-step explanation:
Jupiter is the sixth planet of the solar system and has 79 moons. Lo moon has largest density among all the volcanoes. Lo was discovered by Galileo galilei.
Fifth moon or lo moon of Jupiter is highly volcanically active. Volcanic plumes and heavy lava flows from the lo moon. Lo volcano evolves large amount of sulfur and sulfur dioxide fumes.
Thus, the correct answer is option 1.