What is missing from the diagram showing the relationship among human migration?

In a diagram showing the relationship among human migration, missing information could include:

1. Specific reasons for migration: The diagram may not clearly indicate the various factors that drive human migration, such as economic opportunities, political instability, conflict, environmental factors, or family reunification.

2. Patterns of migration: The diagram may not show the specific patterns of migration, such as rural to urban migration, international migration, internal displacement, or forced migration.

3. Impact of migration: The diagram may not illustrate the impact of migration on both the sending and receiving communities, such as changes in demographics, cultural diversity, economic development, and social integration.

4. Government policies: The diagram may not depict the role of government policies in shaping migration flows, such as immigration laws, border controls, refugee policies, or integration programs.

5. Future trends: The diagram may not provide projections or predictions about future migration trends, such as the impact of climate change on migration patterns, increasing globalization, or the rise of migrant worker programs.