Answer:
Increased immigration
Step-by-step explanation:
Population growth generally refers to increase in population size or the number of individuals in a particular area. Population growth is influenced by four fundamental factors which are;
- Death rate
- Birth rate
- Immigration
- Emigration
While death and emigration negatively affect population growth because individuals are exiting the population, immigration and birth add new individuals into the population and positively affect population growth.
Hence, from all the available options, only increased immigration can lead to an increase in a country's population growth rate.