Final answer:
The US child homicide rate is indeed higher than that of other developed countries, as evidenced by international comparisons.
Step-by-step explanation:
The statement that the US child homicide rate is substantially higher than any other developed country is true. When comparing child homicide rates internationally, the United States has a higher rate than other developed nations. For example, according to a report by the United Nations, Latin America and Sub-Saharan Africa have the highest murder rates in the world, and while the US does not reach the levels of these regions, it is higher than that of other developed countries.
The reading on voting rates, homicide rates by states, and infant mortality rates all highlight various societal issues in the US. While the voting rates in the United States are lower than in countries like Sweden and South Korea, the infant mortality rate is higher than expected for a nation with such high healthcare expenditures. The data from the FBI indicates that states in the Deep South have higher murder rates, while the Centers for Disease Control and Prevention (CDC) show that the infant mortality rate is twice as high in Mississippi than it is in New Hampshire.