Double check my answers! the last question picture really confused me. [part 2]

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement

Are the layers of rock above and below the coal older or younger?

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?