A concept is an preliminary design with an idea or theme as the starting point. It contains a perspective colored pencil drawing of the room for which the design is meant for. This drawing will be made in accordance with the colors shown in the moodboard you have received earlier. The sketch will also contain a floorplan, a suggestion of matching furniture, lighting and window- and floorcovering.
A moodboard is an impression of this starting point and will show you which colors could be used and what kind of atmosphere this will result in.
A 3D visual is a colored computer-made 3D representation of a fully furnished room, including a representation of the atmospheric effects which light (incl. lamps) will make in the room.
A color advice is a personalized advice for an interior design, based on the preferences of the customer with additional suggestions made by the student.