Which of the following describes an effect of migration?

Social effects only exists in the sending country.
Economic benefits are only felt by the receiving country.
Mass migration can prompt negative political reactions to migration.
Mass migration causes an investment in education.

Mass migration can prompt negative political reactions to migration.

Mass migration can also cause an investment in education, as migrants may seek better educational opportunities in the receiving country and governments may invest in education in order to integrate and empower migrant populations.

Mass migration can prompt negative political reactions to migration.

To determine which of the given options describes an effect of migration, we need to analyze each option individually:

1. "Social effects only exist in the sending country": This statement is not entirely accurate. Migration can have both positive and negative social effects in both the sending and receiving countries. In the sending country, the social effects may include a decrease in population and labor force, separation of families, brain drain (loss of skilled individuals), and changes to the cultural fabric. However, it is also important to consider that receiving countries usually experience social effects as well, such as changes in demographics, increased cultural diversity, and the integration of new communities.

2. "Economic benefits are only felt by the receiving country": This statement is also not entirely accurate. While migration does bring economic benefits to the receiving country, such as a larger labor pool, increased tax revenues, and contributions to economic growth, it can also have economic effects in the sending country. For instance, remittances sent back by migrants to their home countries can provide a significant economic boost, contributing to development and poverty reduction. Additionally, migration can also create opportunities for trade and investment between the sending and receiving countries.

3. "Mass migration can prompt negative political reactions to migration": This statement is widely accepted as true. Large-scale migration can lead to negative political reactions, especially if it occurs suddenly or is perceived as a threat to national security, cultural identity, or economic well-being. These reactions can manifest in the form of increased anti-immigrant sentiment, xenophobia, the rise of nationalist movements, changes in immigration policies, and political debates surrounding immigration issues.

4. "Mass migration causes investment in education": This statement also holds true. Mass migration often leads to an increased demand for education and can prompt investment in education systems. The influx of migrants and their families may require additional resources for language training, cultural integration, and education for children. Consequently, this can lead to greater investment in schools, language programs, and educational infrastructure to meet the needs of the migrant population.

Therefore, of the given options, the statement "Mass migration can prompt negative political reactions to migration" accurately describes an effect of migration.