Comparing census data across different years can reveal trends in:

The correct answer is: d) All of the above.

Comparing census data across different years can reveal trends in migration patterns, social indicators, and economic development.

• Migration patterns can be tracked by looking at the number of people who move into and out of a particular area. This information can be used to understand how people are choosing to live and work, and it can also be used to plan for future growth or decline.
• Social indicators are statistics that measure aspects of a society, such as health, education, and crime. By comparing social indicators across different years, it is possible to see how a society is changing. This information can be used to identify areas that need improvement, and it can also be used to track the progress of social programs.
• Economic development can be measured by looking at factors such as gross domestic product (GDP), employment, and inflation. By comparing economic data across different years, it is possible to see how an economy is performing. This information can be used to make decisions about government policy, and it can also be used to attract investment.

In conclusion, comparing census data across different years can reveal trends in a wide range of areas, including migration patterns, social indicators, and economic development. This information can be used to make informed decisions about the future of a community or country.