Hi
The leves need to beed in clay so there comes no air close to the leaves this important because otherwise bacteria could dissolve the leave
The answer is either 75% or 100% I hope this helped you at least a little bit my best guess would be 100%
Layers. Sedimentary rocks are rocks that are packed together underground, the different rocks form layers
I’m pretty sure it’s nanoscopic animal since nanospoic means extremely small and animal is another way of saying livestock so it’s nanoscopic animal or animals :) (I hope this helps you in any way)