Divergent boundaries move away from each other; transform boundaries slide next each other and cause earthquakes
The correct answer is - it's mass.
Jupiter is the biggest planet in our Solar System, but only the biggest, also it has the biggest mass by far from all the planets. Because of its very big mass Jupiter has a very strong gravitational pull. The strong gravitational pull contributes to the attraction and keeping of lots of bodies that can not escape it, instead they revolve around the planet. These objects, or space bodies, that the gravitational pull of the planet managed to trap, became the moons, or rather natural satellites, of Jupiter.
Its lengthy borders touch Germany and Belgium in the north, the Atlantic Ocean in the west, and the Pyrenees mountains and Spain in the south. It also borders the Mediterranean sea in the southeast, and the Alps, Switzerland and Italy in the east.