Which of these is an example of humans domesticating animals?

In order to accurately determine absolute time, you need to know which of the following?

Agerman mapmaker named a continent after me

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.