Which of the following is one of the three factors that contribute to the periodic changes in Earth's temperature known as the Milankovitch cycles? (1 point) Responses Earth's orbit alternates between a circular and an elliptical shape Earth's orbit alternates between a circular and an elliptical shape Earth's shape is spherical Earth's shape is spherical Earth's atmosphere has been enriched in oxygen by cyanobacteria Earth's atmosphere has been enriched in oxygen by cyanobacteria The concentration of carbon dioxide in Earth's atmosphere is decreasing
