Read exactly what I wrote again.<quoted text>
You agree with it, then ask me to justify what you agree with?
To be 'caused' means that there is a cause. So to be caused requires there to be a cause.
I could argue similarly as follows: To be glypted means there is a glypt. So anything that is glypted has a glypt.
What I asked you to do is show that everything is caused. In other words, show that everything does, in fact, have a cause. In order to do this (as opposed to the triviality above), you should probably define what it means to be a cause and then show that everything does have a cause.