Not A Riddle
It was the same type of question it'd previously given Edol's team in the second room. They'd only managed to escape with their lives thanks to the help of the team further inside. Without them, their team might still be trapped in here as well.
'If it gives random questions, it's not impossible that the trapped team has heard this one before, too. I can go back to ask them.'
So that was exactly what Edol did. After telling the trapped civilians not to make any random guesses, he ran back to the third pillar room.
After passing a note over to Elaine and reciting the question verbally, the girl looked up at him in confusion.
After scribbling something on the note, she passed it back to Edol.
"This is the same one you had before that we helped you with, right? The answer was a sphere."
'What is she- Wait!'
Edol recalled the brown orb that'd rolled into the second pillar room previously.