Owing to its northerly position a large part of Ungava is treeless, and belongs to the barren grounds where caribou roam and feed on the socalled caribou moss, a greyish lichen. The caribou, moose, antelope, mountain sheep, beaver, otter and mink are scarce.
Espionage normally is not reconnaissance, because reconnaissance is a military force's operating ahead of its main forces; spies are non-combatants operating behind enemy lines. Often called  recce  (British and Canadian English) or  recon  (American and Australian English), the associated verb is reconnoitre.
Restoring force, in a physics context, is a variable force that gives rise to an equilibrium in a physical system. If the system is perturbed away from the equilibrium, the restoring force will tend to bring the system back toward equilibrium.