Stage 4:14-18 hours has found that there is a relatively constant rate of increase of the population because the population can adapt to resist in the environment. The birth rate is equal to the death rate.
Phase 4: 14-18 hours showed a relatively stable rate of population increase. Since population adapted to withstand the environment. The birth rate, death rate.
Phase 4 said: "the hours 14-18 found a rate of increase population remained relatively stable. Because the population can adapt to eat in against the environment. The birth rate of death rate .