It is a doe because Snape always loved Harry's mother, Lily, and her patronus was a doe. His never changed as he always loved her, as shown in the final book.
Lily's patronus is a doe as it is complimentary to James Potter's stag.
it was Snape's patronus
Severus Snape's Patronus. It was a doe, same as his mother, because Snape always loved her.
His eyes are black.
The incantation for the Patronus Charm is "Expecto Patronum!"
Rowling has never stated what Stan's patronus is. In fact, it's unclear whether he even can produce a patronus. Death Eaters, with the exception of Snape since he stopped being a Death Eater, are unable to produce a patronus. Most fans believe that, since Stan was simply Imperiused and was not a true Death Eater, that Stan was indeed able to produce a patronus.
That is related to the fact that he was in love with Lily Evans - whose patronus was also a doe.
in the 7 book when he goes in snapes memory
In the world of Harry Potter, your patronus can change to the patronus of someone that you fall in love with. Snape was in love with Lily Potter, this is significant because it shows how much he loved her.
J. K. Rowling does not mention Hargid having a patronus in any of the books. This may be because Hagrid got exspelled in his third year. I do think if Hagid had a patronus it would looks like Fang, his dog. :)
A Stag. This was his fathers patronus and animagus form while his mother's was a doe.
it was Snape's patronus
This question cannot be answered since Severus hasn't used the Patronus Charm yet.
Snape was very fond of Lily Potter and he loved her. They both have the same patronus, a doe.
Lily Evans.
A stag, the same animal his father turned into and likely the same patronus.
The Patronus that led Harry to the sword was Snape's Patronus.
In Harry Potter And The Deathy Hallows, Snape sends the silver doe patronus because he was in love with lily potter and that's what form hers was and how he rememebers her. Hope this helps!