Question

Scientists claim major changes in compostion of earths atmosphere was caused by? a, weathering of maountains, b appearance of amphibians, c breakup of Pangaea or d, appearance of photisynthetic

Answer 1

The answer is D. appearance of photosynthesis

Explanation:

The question is asking how do scientists believe which of these affect the Earth's atmosphere. The atmosphere is composed of oxygen and nitrogen, as well as other gases in which you breath and filter out. Because of this, we can mark out a, b, and c because they have nothing to do with the air around you.
Photosynthesis deals with plants taking in the sun's energy, carbon dioxide, and water to make glucose and store it in vacuoles.
When you breath out, you release carbon dioxide into the air.

Carbon dioxide is one of the major greenhouse gases, and affect the ozone layer. Plants are there to use carbon dioxide and convert it to oxygen for you the breath. Too much of carbon dioxide leads to climate change and is a dangerous gas if you decide to breath it back in instead of oxygen.