During the process of demographic transition, why does the total population continue to grow if the natural increase rate is moderating?

the crude birthrate stabilizes while the crude death rate declines.
the crude birthrate remains higher than the crude death rate.
the crude birthrate declines faster than the crude death rate.
economic changes stabilize the crude death rate.
economic changes stabilize the crude birthrate.

The crude birth and death rates are simultaneously low.

Explanation:

A demographic change model incorporates 4 phases: low development, high development, diminishing development, and low development with ZPG.

Reducing improvement potentially happens when birth rates start to quickly rot, and passings rate decline as well, in which typical rates begin to coordinate.

Finally, a low improvement rate as the fourth stage perhaps happens when exceptionally low birth and end rates make no whole deal trademark increase and possibly a decrease.

Low advancement arranges much of the time are went with ZPGs (zero masses improvement), which happen when CBR and CDR are practically identical and NIR approaches 0.