How to launch a graphical shell on demand?

Question

linux

The question is not quite ordinary, but for cognitive purposes it is necessary to answer it.
Suppose the following situation:
There is a Linux machine running without graphics.
Is it possible that the graphics itself is installed and that when you run an application that needs it, it would automatically launch it?
In which direction to google to get this.
It should turn out like this. system booted without graphics. gave a command, for example, to firefox, so that the graphics would start and firefox too

Answer 1

startx && firefox ?