Actually Teams has both channels and threads, it's just that they are so cumbersome and clunky and unintuitive that no one seems to use them or even realize they are there. Hence the reason there's like a dozen similar group chats all with a different subset of people in them. Oh, and some of these group chats were originally created from some meeting months ago so they are in a completely different list than the other group chats for some reason.
Personally, I find Teams to be a huge productivity killer. It's constantly interrupting my work and demanding my attention because there's some conversation going on in one of the group chats that's completely irrelevant to me, but I can't just put damn thing on mute because while the signal to noise ratio is low, I can't just completely ignore the signal part either. If I could only convince people that disseminating important information only through Teams in some random chat room is just a bad idea, but alas I have seemed to have lost that battle.
Hence the reason it's almost certainly fake. Even a 5 year-old could easily rattle off several animals with three letters in them without much thought.
Now if it was something like what animals has only two letters in it, that's something most people would actually have to think about.
My answer: Ox