Radioactive decay in the Earth, especially in the Earth's crust, creates a tremendous amount of pressure. heat.

Heat

Explanation:

As the radioactive materials experience degradation, as underneath the surface in the earth's surface, enormous amounts of heat are generated to send their daughters products.

d. stage 4

explanation:

the existence of some kind of demographic transition is widely accepted in the social sciences because of the well-established historical correlation linking dropping fertility to social and economic development.[1] scholars debate whether industrialization and higher incomes lead to lower population, or whether lower populations lead to industrialization and higher incomes. scholars also debate to what extent various proposed and sometimes inter-related factors such as higher per capita income,lower mortality, old-age security, and rise of demand for human capital are involved.[2]