Agree with the consensus on 3. The lack of laces was making me overthink it!
Ditto. I was thinking brake (break) shoe!
Definitely the weakest of the six.
I think it's pretty good once you know the answer
Unlaced, as a rim might be? Worst of the bunch...
Now that's an interesting thought.
However, having consulted the person who sent me the image in the first place and like a Smartie had the answers, I can confirm that what @winjim (and others) have posted is correct.
I much prefer your line of thinking though!
I don't like it, a pump is not a part, it's a tool or maybe an accessory.