The introduction of Buddhism to China is an example of which of the
following principles?
diffusion
confusion
O
fusion
O
distribution

Diffusion.

Explanation:

Tip: one way I used to remember this word from AP Human Geography, was "oil diffuser" because it spreads the oil or scent throughout the room, the same way a cultural element or practice can be spread through different types of diffusion.

Its been two years since that class but won't forget it! Hope this helps!

deflation   hope this