Question

how does the picture of brook came alive?

Answer 1

hello friend
here is the answer of ur query
the first image that appeals to me is that of the brook passes through hills and valleys .
under the bridges by the town villages 
by thirty hills i hurry down ,
or slip between two ridges 
by twenty thropes,  a little town
and half a hundred bridges. 

the second image that appeals to me is that of the continuous flow of the brook with different kinds of flowers and fishes in it .
i wind about , and in and out   
with here a blossom sailings ,
and here and there a lusty trout ,
and here and there a grayling ..

hope this helps u =) 

Answer 2

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Brook ate the Yomi Yomi no Mi devil fruit.

• The Yomi Yomi no Mi is a Paramecia-type Devil Fruit which enhances the user's soul to the point where they can come back to life after dying once, remaining alive until their body is sufficiently damaged, and to use several other soul-based abilities, making the user a Reviving Human (復活人間 Fukkatsu Ningen?). The name is derived from Yomigaeru (よみがえる), meaning "Resurrection", also, Yomi (黄泉) is the name of the Japanese underworld.

As for why he is a skeleton.

• Brook's soul was able to return to the mortal world thanks to the powers of his Devil Fruit. Unfortunately for him, he had lost his body because of the fog in the area (it made it hard to find the ship) and had to search for it for one year. When he finally found his body, it was just a pile of bones.