<span>The answer is gravity. According to general relativity by Einstein,
the bending of space-time is dependent on the nature of the matter of the
object, or energy, momentum, and radiation. The heavier the object, the bigger
the curvature of space-time it causes, that is felt as gravity. Heavier objects with a bigger
gravity pull, pull other objects (with lesser gravity pull) more towards them
than vice versa. </span>
