The working out, or explanation, of the plot following the climax is the exposition development resolution

The correct answer for the question that is being presented above is this one: "resolution. The working out, or explanation, of the plot following the climax is the resolution. Resolution, or end or conclusion -  Whatever you want to call it. But this is the final part of the story when everything is wrapped up. 

I'd say it's probably D, since it describes what the noun is, we know it's a lighthouse, but D describes what the lighthouse looks like.