If a country’s total fertile rate ref is measured at 1 what does this number most likely invocare about the country’s population

It means that the countries population is aging, especially the females and that country doesn't have enough people being born to replace the people dying, which will cause the countries economic structure will fall.

land

explanation:

australia is the flattest continent, and it has vast plains.

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.