Final answer:
Sierra Leone has the lowest average life expectancy at around 50 years.
Step-by-step explanation:
The country with the lowest average life expectancy is Sierra Leone. According to the World Bank's data, Sierra Leone has a life expectancy of approximately 50 years. This is significantly lower than the global average life expectancy of around 70 years.
Sierra Leone faces various challenges that contribute to its low life expectancy, including a high prevalence of infectious diseases, limited access to healthcare facilities, and poor sanitation and hygiene conditions. These factors impact the overall health and well-being of the population and result in a shorter average lifespan.
It is important to note that life expectancy can be influenced by multiple factors such as healthcare, sanitation, nutrition, and socioeconomic conditions. Other countries listed in the options, such as Uganda, Fiji, and Guyana, also have lower life expectancies compared to global averages but are not as low as Sierra Leone.