Why did the moth population change from mostly dark to mostly light from the 1950s to the 1990s? Evidence #1 (including source) Evidence 2 (Including source) Reasoning​

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]

the europeans in the caribbean colonies had to turn to africans to replace the native peoples as slave it would be letter a