John is a canadian having dinner with his friends from china. he openly shows both his enthusiasm and his anger about various topics as they speak. john notices that his friends smile and nod but that they do not display strong emotions. this is an example of

Cultural influence on social norms

Explanation:

Cultural has a strong influence on the norms of the country. These influences are seen in the behavior of the specific cultured person. This is the expectation of people's side related to their norms and beliefs.  

Some silent norms are governed by the govt. related to specific behavior. Behavior is accepted or non-accepted in the culture of a country. Social and cultural perspective has great influence o people behavior specifically in the context of the violence and what is the prevention to avoid the violence.  

Thus Jon and his china friend both have shown their cultural influence in their behavior.  

answer; necessity-driven;