Wood
Wood is produced by felling trees. This can be accomplished by deconstructing a tree, or, more commonly, by Foraging
Foragers assigned to a Royal Forest zone will fell trees in that zone (as long as the priority on Wood in that zone is greater than zero and there are trees available).
Felling a tree will produce some number of Wood and some number of Wood Rod depending on the type and maturity of tree.
Wood is an essential resource in the game, primarily for its use in producing Firewood.