Answer:
The crust and outer part of the mantle.
Explanation:
The crust and outer part of the mantle are the two top-most layers of Earth. The lithosphere is comprised of these two. Here's a picture for an example.
Answer:
No humidity, constant cool temperature, serenity and calmness, and no crowds or lcrowd noises Camping in a cave is in many ways a lot more challenging than even the most dangerous places for sleeping outdoors.