which of the following best describes the effects of revolution of the earth? Select one: a. causes four seasons, varying lenghths of day and night , lunar eclipse and changes in position of the midday sun at different times of the year. b. causes seasons ,varying lengths of day and night, eclipse and changes in position of the midday sun at different times of the year c. causes solar eclipse , four seasons and varying lengths of days and nights and changes in the position of the sun at different times of the year

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]