Final answer:
The geographic factor that best explains China's ability to influence the cultural development of Japan is its proximity and close relationship with Japan.
Step-by-step explanation:
The geographic factor that best explains China's ability to influence the cultural development of Japan is its proximity and close relationship with Japan.
Being located in close proximity to Japan allowed for frequent interactions and exchanges between the two countries throughout history.
This proximity facilitated the transfer of cultural elements, such as Buddhism and Confucianism, as well as the exchange of knowledge and skills.
China's influence on Japan's cultural development can be seen through the adoption of Chinese-influenced written language and the emergence of unique cultural traditions in Japan.