Years are ordinal numbers, the kind of number that tells you which place you finished in a race, and as such cannot have zeroes or negatives. You’re living in the 2,024th year since the instant that began the Common Era. “0th” and “-1st” are not valid expressions for years for the same reason that you can’t place 0th in the Olympics
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)