The word formation is made up of what

Formation is already a word that means that is the root and in can be used as a prefix so, the answer should be "a root and prefix"     

Even though -tion is a suffix "informa" is not a word so, that can't act as the root! :)

1one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.2 this being so, my trip demanded that i leave my name and my identity at home.3 i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.4 with all this in mind i wrote to the head office of a great corporation which manufactures trucks.

Just look in the passage for where the claim is, and then look for supporting evidence. we cant cite it for you if we dont have the passage im