Answer:
Oh wow thats cool...... you can just look it up on the internet. There are the most amazing tricks and things on there.
The answer is:
For the farmers own needs
Asteroids vary greatly in size and are mostly made up of frozen water and gas. This one is true.
They are said to be "mostly formed of ice and gas" as they rarely can be found consisting of stone, nickel and iron. These are extremely dangerous in our Universe.
