It is reasonable to assume that nations with a low total fertility rate (tfr) and a modest amount of population growth are in of warren thompson's demographic transition model.. . a.. stage 1: balance. . b.. stage 2: growth. . c.. stage 3: leveling. . d.. stage 4: replacement .

3. leveling

Explanation:

The "demographic transition model" is a model that describes how population changes over time in a particular society. It was developed by Warren Thompson in 1929, based on studies of industrialized societies over the past two hundred years.

The model contains four stages of transition. In this case, when a nation has a low fertility rate and a modest amount of population growth, it is likely that the nation is in stage three. During this stage, the population moves towards stability through a decline in the birth rate.

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