What is the difference between culture and cultural diffusion? add examples and it used in a !

Culture is the manifestation of intellectual properties that was invented by a certain social group,

Cultural  diffusion is an occurrence when two or more social groups live together within a same territory, and  the cultures that they held started to merge with one another.

Sentence:

- In Japanese culture, people bowed whenever they introduced themselves to another person as a sign of respect.

- Because of a cultural diffusion, Chinese traditional dresses that are sold in America was sold in lower cut to accommodate the fashion trend that exist in America.

Examples:

- When Carlos and his family moved from Mexico into united States, he opened a Mexican restaurant in his neighborhood. But, He changed the original recipe and transform the food into localized product (such as adding more cheese or presenting rice-based food with white bread)

The Sahara desert, located in northern Africa, is the largest desert in the world