What type of population pyramid would a nation most likely have if it had a high birth rate 30 years ago and has a low birth rate now? (1point)
1 stationary stationary
2 constrictive constrictive
3 improving improving
4 expansive
4 expansive
An expansive population pyramid typically has a wide base that represents a high birth rate in the past, leading to a larger younger population. As the birth rate decreases, the pyramid may become more evenly distributed across age groups.