Which event was a major source of atmospheric oxygen A. Volcanic eruptions
B. Decomposition of water
C. Outgassing
D. Photosynthesis

Please help me!

Select the correct answer from each drop-down menu. daniel and sanya are scientists. daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. sanya is investigating whether the discharge from industrial plants has any impact on the ph concentration of freshwater swamps in the surrounding area. which fields of science are daniel’s and sanya’s studies most closely related to? daniel’s field of study is related to science, and sanya’s field of study is related to .

How have the greenhouse gasses increased from the year 2000 to 2018

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.