Final answer:
The theme of geography that best describes the statement 'Vietnam is to the south of China' is Location.
Step-by-step explanation:
The theme of geography that is best described by the statement 'Vietnam is to the south of China' is Location.
Location is one of the five themes of geography and it refers to the position or place of a particular point or area on the Earth's surface. In this case, the statement describes the specific location of Vietnam in relation to China, indicating that Vietnam is situated to the south of China.
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