Final answer:
The birth registry collects demographic data such as the number of live births in a year and the fertility rate. These data are important for tracking population trends and understanding factors like birth rate and death rate.
Step-by-step explanation:
The birth registry collects demographic data such as the number of live births in a year and the fertility rate. These data are important for tracking population trends and understanding factors like birth rate and death rate. For example, vital statistics registries and censuses are used to collect this type of data, which includes information on variables like age, sex, marital status, education, employment status, and occupation.