"Three dimensions seems to be the minimum for life. A living being in two dimensions is too difficult to exist."
Imagine the laboratory in 2D. There would be no laboratory and no meeting place.
The 3 dimensional models construct what was purely from imagination.
"It is the struggle to adapt to the environment which ensures the survival of the fittest."
The laboratory is positioned to adapt to it's environment. The model fits into the landforms so a ramp and meeting place is formed.