which aspect do young and elderly people differ most?

尽量说的详细点，拜托
用英语写 哥哥姐姐恩 我们在英语课要进行讨论，请以此题目写一篇英语文章，约150字

which aspect do young and elderly people differ most? Which floor do you____? Which book do you like? Which class do you want which season do you like best ? why ? In which month do people speak least? which English song do you like best? in which mouth do people speak least? Which fruit do you like best? which festivals in western countries do youknow