Alright. Thats going nowhere.
Can you explain what causes virtual particles?
This can be interpreted in two distinct ways:
1. What is the cause for virtual particles existing at all?
2. What is the cause of particular virtual particles existing?
In neither is there, in fact, a cause. Virtual particles are, in a sense, a 'bare fact' about the universe: they appear spontaneously, interact, and disappear spontaneously. There is no 'cause' for their appearance and no 'cause' for their disappearance.
The appearance and disappearance are *allowed* and *described* by the laws of physics. But that is not a 'cause' but rather a description of how things work.
Now, there is a sense in which you can 'explain' the existence of particles of various sorts (and virtual particles are all specific types of particles, like electrons, or muons etc) as coming from the symmetry properties of the natural laws. But then, those symmetry properties are 'bare facts' that have no further explanation.