Translation of "landscape component" into Italian

In visual assessment work, landscapes can be divided into four major elements. a) Form is the perceived mass or shape of an object that appears unified, and which provides a consciousness of its distinction and relation of a whole to the component parts. b) Line is the real or imagined path, border, boundary, or intersection of two planes, such as a silhouette, that the eye follows when perceiving abrupt differences in form, colour or texture. c) Colour is a visual perception that enables the eye to differenciate otherwise identical objects based on the wavelengths of reflected light. d) Texture is the visual feel of a landscape.