The correct answers are:
- It keeps Earth warm;
The Earth's atmosphere contains gases that enable the so called ''Greenhouse effect'', which means that they are able to trap the heat that is reflected from the surface of the Earth, and keep it in the atmosphere.
- It filters UV radiation;
It is crucial that the atmosphere, mostly the ozone layer in it, to filter the UV radiation, because it is devastating towards the living organisms if it is too intense.
- It provides water in the form of rain;
The atmosphere provides the right conditions that the water vapor condensates at certain parts of it, thus enabling the rainfalls, which are crucial for the living organisms.
