The most accurate comparison between Tokyo and Rio de Janeiro from the options provided would be: Part of Rio de Janeiro’s population is in poverty; this is not true for Tokyo.
This statement reflects the socioeconomic conditions in both cities. Rio de Janeiro does experience significant poverty, particularly in its favelas, while Tokyo, as one of the wealthiest cities in the world, has a much lower poverty rate overall, although it does have some socioeconomic disparities.
The other statements contain inaccuracies or oversimplifications regarding the population trends and tourism policies. For example, Tokyo does encourage tourism and is also facing its own demographic challenges, including population decline in certain areas.