To determine which country had the lowest death rate during WWI from the data provided in the chart, we need to examine the "Percentage of Population" column.
Here are the death rates provided for each country:
- Russia: 1.1%
- France: 1.5%
- UK: 0.24%
- Italy: 1.6%
- Serbia: 5.7%
- US: 0.1%
We compare these percentages to find the smallest value.
- 1.1% (Russia)
- 1.5% (France)
- 0.24% (UK)
- 1.6% (Italy)
- 5.7% (Serbia)
- 0.1% (US)
The country with the lowest death rate is the one with the smallest percentage. By looking at these values, we see that the smallest death rate is 0.1%.
Therefore, the country with the lowest death rate during WWI is the United States (US).
So, the answer is:
the US