Final answer:
The country in question fits in Stage 3: Take-off of Rostow's five-stage model of economic growth. In this stage, the country has made business connections and has started manufacturing products. The population is experiencing a high rate of rural-to-urban shift, with income levels increasing and family size decreasing significantly.
Step-by-step explanation:
The country in question would fit in Stage 3: Take-off of Rostow's five-stage model of economic growth.
In this stage, the country has made business connections and has started manufacturing products. Industrial activities and the service sector have also increased. The population is experiencing a high rate of rural-to-urban shift, with people migrating from rural areas to cities for employment opportunities. Income levels start to increase, and family size starts to decrease significantly.
Overall, stage 3 countries have an expanding population pyramid.