Final answer:
The diagram might be missing the concept that 'New customs and beliefs are adopted' which explains how new ideas and customs are integrated and transformed through the process of human migration and cultural diffusion,
Step-by-step explanation:
The diagram is likely missing d. New customs and beliefs are adopted. This refers to the phenomenon that occurs when human migration facilitates the exchange of ideas and customs. Diffusion of cultures often results in the adoption of new customs and beliefs by the people encountering the migrating group.
This exchange can lead to transformations within both the incoming and the receiving societies. As people migrate, they bring their cultural practices with them, which can be altered to fit new environments or merge with the local traditions, leading to cultural hybridity.
For example, the spread of cuisines like Thai noodles or Italian gelato exemplifies how the movement of ideas and customs can lead to their integration into different cultures. Similarly, the cultural shifts among migrants from rural to urban environments, such as changes in family structure, food preferences, and language use, represent how migration affects cultural practices. Additionally,
large-scale movements such as diaspora and transnationalism have a profound impact on cultural exchange and the development of hybrid cultures.