Io has the most volcanic activity in the Solar System because:
A) it is continually being bombarded with material in Saturn's E ring
B) it is one of the largest moons and its interior is heated by radioactive decays
C) of gravitational friction caused by the moon Enceladus
D) its interior is tidally heated as it orbits around Jupiter
E) the ice on the surface creates a large pressure on the water below

Question

Quizplus · Accepted Answer

Io experiences the most volcanic activity in the Solar System because of tidal heating caused by its orbit around Jupiter. The gravitational pull from Jupiter causes tidal bulges on Io's surface, which create friction and heat inside the moon's interior, leading to volcanic activity.

Io Has the Most Volcanic Activity in the Solar System