Answer:
aging population -- > U
low standard of living -- >M
overfishing -- > G
Step-by-step explanation:
- The population of the United state is mostly urban and has a wider based and less young people as its more of a bell-shaped as the rapid growth of employment opportunities and the development of industrialization has created a major impact on the population growth of the country.
- Low standards of living are found in low developed countries like Mexico as the people have low standards and low access to wealth and thus are migrants to the Americas.
- Whereas Greenland located on the arctic circle has fewer populated areas and mostly depends on the fishing and fish consumption form the oceans.