Final answer:
The fable 'The Magic Cask' teaches the importance of kindness and the need to be thankful for and prudent with unexpected blessings.
Step-by-step explanation:
The two themes of the fable 'The Magic Cask' from 'The Chinese Fairy Book' are best represented by the options: (1) There are consequences for being unkind, and (2) Be grateful for the gifts you are given. These themes illustrate the moral lessons that one should consider the repercussions of their actions, particularly towards their family members, and that one must appreciate and responsibly use the windfalls that come their way. It also emphasizes the importance of family as the man's actions lead to the appearance of dead grandfathers in the cask.