Final answer:
Stage 3 of the Demographic Transition Model is characterized by declining birth rate and high urbanization rate. The impact of infectious diseases reduces, while degenerative diseases and diseases caused by human activities become more prominent.
Step-by-step explanation:
Biology: Stage 3 - Degenerative and Human Created Diseases (Moderately Declining CDR)
In Stage 3 of the Demographic Transition Model, a declining birth rate and high urbanization rate are observed. This stage is characterized by a transition from a rural pre-industrial society to an urbanizing and developing country. The population growth is moderated due to factors such as improved public health and sanitation, medical innovations like vaccines and antibiotics, and reduced impact of infectious diseases. However, degenerative diseases and diseases caused by human activities become more prominent.
Examples:
Increased prevalence of cardiovascular diseases, cancer, and accidents.
Continued impact of infectious diseases in poorer nations, like tuberculosis, malaria, pneumonia, influenza, and HIV/AIDS.
Environmental pollution affecting ecosystems and human health.