which of these shows rapid population growth?

Brief Explanations:

In population - related studies, a triangular - shaped population pyramid indicates rapid population growth. It has a wide base representing a large number of young individuals and a narrow top representing fewer older individuals. This implies high birth rates and relatively low life - expectancies or high death rates among older age groups in the past. The first image is triangular in shape while the second is more bell - shaped.

Answer:

The first image (the triangular - shaped one)