The correct answer is - The Sun, because it's the largest body in the solar system.
The Sun is the center of the our solar system. It is the only star in it, and it is the only objects that radiates light and heat from it, while all the other objects are cold objects that are dependent on it for their temperatures.
Also, the Sun is by far the biggest object in the solar system, thus it has the biggest mass, and that gives it its very big gravitational pull, which is much bigger than the second biggest of the planet Jupiter.
