Why the Earth’s air envelope — the atmosphere — can be called a protective envelope?

There is ozone in the atmosphere. It forms a special ozone layer, which traps radiation from space, which is dangerous for organisms. In addition, the atmosphere, like a blanket, protects the Earth from strong cooling at night. It protects the Earth from meteorites. Most of them, getting into it, burn out.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.