Describe how the structure of a country’s population changes between stages 2 and 4 of the Demographic Transition Model

In stage 1 the two rates are balanced. In stage 2 they diverge , as the death rate falls relative to the birth rate. In stage 3 they converge again, as the birth rate falls relative to the death rate. Finally in stage 4 the death and birth rates are balanced again but at a much lower level.

Answer// dinosaurs emerged during mesozoic era;

The answer for your problem would be a. 7