The correct answer is B) height of tide. The height of tide refers to the vertical distance from the tidal datum (a reference level for measuring tide heights) to the level of the water at a specific time. This is the actual water depth at that location and moment, as opposed to the charted depth (C) which is the depth shown on a nautical chart. The range of tide (A) is the difference between the highest and lowest tides, not the water depth itself. The actual water depth (D) is another way of referring to the height of tide.