Respuesta :
A different region of the world is represented by each node in the tree. Think about the "Great Britain" node.
This node is composed of two parts: The label's name, "Great Britain," is the most evident component.
(define world-tree
(make-node
'world
(list (make-node
'italy
(cities '(venezia riomaggiore firenze roma)))
(make-node
'(united states)
(list (make-node
'california
(cities '(berkeley (san francisco) gilroy)))
(make-node
'massachusetts
(cities '(cambridge amherst sudbury)))
(make-node 'ohio (cities '(kent)))))
(make-node 'zimbabwe (cities '(harare hwange)))
(make-node 'china
(cities '(beijing shanghai guangzhou suzhou)))
(make-node
'(great britain)
(list
(make-node 'england (cities '(liverpool)))
(make-node 'scotland
(cities '(edinburgh glasgow (gretna green))))
(make-node 'wales (cities '(abergavenny)))))
(make-node
'australia
(list
(make-node 'victoria (cities '(melbourne)))
(make-node '(new south wales) (cities '(sydney)))
(make-node 'queensland
(cities '(cairns (port douglas))))))
(make-node 'honduras (cities '(tegucigalpa))))))
Learn more about node here-
https://brainly.com/question/28269884
#SPJ4
