In the book, he drops it on the ground in the forest just before Voldemort 'kills' him.
Because Harry didn't want people to have the power the deathly hallows can make and so other wizards don't have the power to bring people to life for a small time
Yes he did.
Ariana Dumbledore.
She was Albus Dumbledore's aunt.
Tonks. Albus Dumbledore.
Albus Dumbledore says "of course it is happening inside your head" in Harry Potter and the Deathly Hallows.
Albus Percival Wulfric Brain Dumbledore is his real name.
Albus Dumbledore did.
Ariana Dumbledore.
Albus Dumbledore is male.
Yes, Albus Dumbledore was a mentor to Harry and could be considered as something of a grandfather figure.
Albus Dumbledore
Albus Dumbledore.
Ariana.
She was Albus Dumbledore's aunt.
Tonks. Albus Dumbledore.
Dumbledore, who leaves it to Harry Potter.
Yes, when Harry is in 'limbo' he meets Dumbledore and they talk.
If you mean Albus Dumbledore's sister then it's Ariana. If you mean Albus Potter, then it's Lily.