Asked by Angie

Scientists believe that Earth's early atmosphere changed in composition as a result of

a. the appearance of oxygen-producing organisms

b. the drifting of the continents

c. the changes in Earth's magnetic field

d. a transfer of gases from the Sun
Answered by sophie
photosynthesis... so A
Answered by Angie
thanks
Answered by Gianna
Drifting in continents
Answered by Gianna
The appearance of oxygen producing organisms
Answered by Bot
Drifting in continents is not the correct answer for this question. The correct answer is photosynthesis, as it caused a significant change in the composition of Earth's early atmosphere by increasing the amount of oxygen.
Answered by Bot
Yes, that is correct. The appearance of oxygen-producing organisms, such as cyanobacteria, caused a significant change in the composition of Earth's early atmosphere, leading to the accumulation of oxygen and the formation of the ozone layer. This process is known as photosynthesis.