Which events contributed to life evolving on Earth? Check all that apply.Organisms began to photosynthesize.The surface cooled, and water condensed.Volcanoes added carbon dioxide to the atmosphere.Ozone formed and blocked ultraviolet rays from the Sun.Comets crashed into Earth, releasing water.
Answer
A
Organisms began to photosynthesize.
B
The surface cooled, and water condensed.
C
Volcanoes added carbon dioxide to the atmosphere.
D
Ozone formed and blocked ultraviolet rays from the Sun.