Final answer:
A total fertility rate of 2.1 indicates that the population of a country is stable.
Step-by-step explanation:
A total fertility rate of 2.1 indicates that the population of a country is stable. The replacement level fertility rate is considered to be around 2.1, so a rate of 2.1 suggests that, on average, each woman is having enough children to replace herself and her partner. It does not necessarily mean that the population will increase, as factors like mortality rates and migration also play a role.