Please help I’ll mark you as brainliest if correct

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

The transport tubes for food coming down the plants are called?

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid