Question

write two reasons for origin of life on the earth​

Answer 1

Originally, the Earth's atmosphere had almost no free oxygen. It gradually changed to what it is today, over a very long time (see Great Oxygenation Event). The process began with cyanobacteria. They were the first organisms to make free oxygen by photosynthesis.

Answer 2

Generally the earth's atmosphere creats suitable condition for life form

a) presence of flora

b) presence of air, water

I hope this will help you