Awkward title probably, but lemme explain:
The question is “This piece of French architecture was finished on January 26, 1887.” You know this is the Eiffel Tower. But when you buzz in and give the response, you say:
“Who is the Eiffel Tower?”
Would you be awarded the points for being correct, or docked the points for being incorrect since you didn’t say “WHAT is the Eiffel Tower?”
I can’t speak for the official rules, but I swear I’ve heard “What is…” in times when that’s not the most appropriate response.
It sure feels like “in the form of a question” is more important than if the question itself makes grammatical sense.
“How about the Eiffel Tower?”