I'm curious how (not why) this question was closed. I see it is closed as a duplicate by one person, FumbleFingers.
I'm only familiar with closes being done by voting to close (with a required vote of up to 5, I think). When that happens, the statement about the close lists those who voted to have it closed.
In this case there is no list of voters; there is only one member named. I checked the list of moderators, and I don't see FumbleFinger listed among the moderators. So I'm ruling out that it was closed by a moderator.
Am I understanding this right? That one person, who is not a moderator, can close a question?
How exactly does that work (even if I got some of my facts wrong)?