my money is on Zoo, for the reason that: if you were surveying a planet, and the dominant species regularly engages in assymetrical warfare against every other

my money is on Zoo, for the reason that: if you were surveying a planet, and the dominant species regularly engages in assymetrical warfare against every other species it encounters.... would you pay them a visit? we're stuck on a literal planet of Predators worse than a Zoo though, would be a Lab: were we made for a purpose by someone else to test a hypothesis? or even worse... what if we are the control group?