All three questions use a combination of kanji and hiragana. To me, the average number of strokes per character in all three questions look about the same. The

All three questions use a combination of kanji and hiragana. To me, the average number of strokes per character in all three questions look about the same. The second question does use quite a lot of kanji with lots of strokes, but so do the other questions. If I'm just not seeing it and there are indeed more complicated kanji in the second question, then it's probably mostly a coincidence, although complicated concepts are often represented by complicated kanji.