These are hard sometimes for me, from UK:

What counts as a truck? Is a fire engine a truck, is a 4x4 (like a Landrover), a HGV (ie lorry), a box van?

What counts as a bus? Is a coach a bus, a minibus?

What counts as a bicycle? Is a pedal-and-pop (a pedal cycle with an engine)? The image shows part of a headset that might be on a bike, is that enough to call it a bike, might be a lightweight motorbike?

Is a hovercraft a boat? Is a helicopter an aeroplane (according to the people setting the question)? Do pedestrian facing lights count as traffic lights?

Then every now and again they add in an image that is, I assume, purposefully obscured (uniform noise) as if painted by an impressionist and titled "boring city with smog as viewed by someone with cataracts, there might be half a bicycle wheel in somewhere".