It’s meant to roughly gauge how clearly you picture things in your mind’s eye by asking you which apple you see when prompted to imagine one. #5 references the lack of a mind’s eye in people with Aphantasia (coincidentally this Wikipedia article has this same chart as a header image)
I got stoned in VRChat for the first time, not too long after getting my first VR headset. As a furry who’s very interested in screwing with my sense of self, this was a really big deal to me in a way I can’t easily explain.