Ineed examples of cultural diffusion and why

Common Cultural Diffusions:

A Chinatown is an area with people from China, Taiwan, Hong Kong, and Macao and these exist throughout the United States and all over world in general.

Some people in the United States play hockey, which is played in Canada. The increase of music throughout the world shows cultural difussion.
As an example, jazz started as  a mixture of music from Africa and the Caribbean.

Southern cities in the United States, especially state line towns, have signs in both English and Spanish.

The popularity of sushi, a traditional Japanese dish, shows diffusion of Japanese cuisine.

The French Quarter in New Orleans show diffusion of French culture. People in the United States celebrate Cinco de Mayo.

Over two million persecuted Jews fled Eastern Europe between 1881 and 1914 to live in Britain or the United States.

The English language is a good example of diffusion, as it contains many words from other languages.

Australia used to be predominantly an aboriginal cultural community and now has many aspects of British culture. 

An example of forced diffusion would be taking Africans from their home to become slaves.

 An example of cultural diffusion with negative effects would be the spread of diseases, like AIDS , Bubonic Plague and Smallpox.

Hope this helps :)

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !