Which stage of the demographic transition model is represented by a population pyramid with a wider base and narrower top?

The description of a population pyramid featuring a wider base and a narrower top corresponds to the characteristics of Stage 1 of the demographic transition model. In Stage 1, a population pyramid typically has a broad base due to high birth rates, which are common in societies with limited access to healthcare, education, and family planning. This often leads to a youthful population structure. The tapering off at the top indicates lower life expectancy, which is also characteristic of this stage.

As for the other stages, Stage 3 would show a pyramid with a still wide base but less pronounced than Stage 1, reflecting declining birth rates and an increasing proportion of the population in older age groups. Stage 4 and Stage 5, representing mature and declining populations, respectively, would show a more balanced structure or even an inverted shape, with a smaller base relative to the older population. Therefore, the correct decision is that the population pyramid described, with a wider base and narrower top, unequivocally illustrates Stage 1 of the demographic transition model.