Kelly is walking on the beach when she finds an interesting rock. She picks it up, examines it, and wonders what type of rock it is and how the rock was formed. What type of rock did Kelly find and how you can tell? Describe how this type of rock is formed.

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]

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explanation: