Free points i am so bored if your down to talk you can but if not have the points

What best explains the inability for life to exist in earth early atmosphere

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?