In your paper you should describe the concept of plate tectonics and how it explains the evolution of landscapes in North America, New Zealand, and in eastern Australia.
(you; should describe; the concept of plate tectonics; L:In your paper) (it; explains; the evolution of landscapes in North America, New Zealand)
you it
should describe explains
the concept of plate tectonics L:In your paper
the evolution of landscapes in North America, New Zealand