Because in the prelude to" " Gandalf assisted Bilbo and thirteen dwarves steal a load of treasure from a dragon. Which the dragon stole from the dwarves a long time ago.
Gandalf gave Bilbo a sword.
Bilbo sneaks out of the dwarf camp to give the Arkenstone to the beseigers. He is surprised to see Gandalf there.
He was not identified by name. He was sent to look in the area that Bilbo had last been seen in by Gandalf. He was strong and surefooted and carried Bilbo down to the camp.
Frodo knows Gandalf because Gandalf was like Bilbo (Frodo's grand-uncle) guardian on Bilbo's adventures. Now, Frodo knows Gandalf through Bilbo.
Which time? Gandalf helps Bilbo many times, both during The Hobbit and The Lord of the Rings.
Gandalf surprised Bilbo and he was foreshadowing the future
Yes, the wizard(Gandalf) likes Bilbo very much. It is by the will of Gandalf that Bilbo comes along with the dwarves for the quest. His concern for Bilbo can be seen when all the dwarves come out from goblin's cave but Bilbo remains behind. Gandalf continues to visit Bilbo even after the end of dwarves quest.
Gandalf noticed the ring turning Bilbo crazy so he forced him to give it up and leave it behind
The Goblins and Wargs trap Bilbo, Gandalf, and the Dwarves by besieging the mountain and trapping them.
Bilbo travels with Gandalf and Beorn to the long north pass around Mirkwood. Then they stay at Beorn's house for the winter. Then Gandalf and Bilbo travel to Rivendell, there Bilbo gets medical attention. Then Gandalf and Bilbo travel the long way to the Hobbit lands.
His beautiful door was marked where Gandalf clubbed it. The true reason for this, which Bilbo did not know, was that Gandalf was removing the sign he had scratched in the door earlier.
Gandalf believes in Bilbo, and he says in the book that he wouldn't of brought-en him if he wasn't in good use.
because the dwarves needed a fourteenth person for their journey and gandalf thought bilbo was the right person for the job.
Gandalf recruited Bilbo to act as the party's thief.
on a travel
Gandalf, of course.
No, Gandalf never told the dwarves that Bilbo was a spy. He was a good friend of Bilbo's, and they trusted each other.
Gandalf is a wizard that pulls Bilbo out of his house and sets him on a mission.
Gandalf dissapered because he wanted bilbo to take charge
Bilbo was a young child and gandalf came thru with fireworks But he really met met him at his door and while he got the mail They both blew smoke rings remembering the fireworks and Bilbo inadvertantly wishing for adventure and times like when he was a young hobbit Bilbo good dayed gandalf several times in several different ways Gandalf marked his door after bilbo hastily departed after Inviting gandalf for tea the following day
The news that Gandalf received that made him rejoin Bilbo was the fact that the armies of the Goblins and of the Wargs had gotten together.