Why does Cosette sing ''Castle On A Cloud''? Extra credit for music class

The song is sung by Little Cosette while dreaming of a better life instead of the life with the Thénardiers. She dreams of a "castle on a cloud", a realm of her own imagination where all children are free to play and she is loved. The third verse speaks of a lady all in white who loves her and it is implied that this is her vision of her mother, Fantine. Madame Thénardier intervenes during the song and verbally abuses Cosette, ordering to "draw some water from the well in the wood", despite the fact that it is cold outside and Cosette is afraid. Meanwhile, Madame Thénardier dotes on her own young daughter Éponine.

Religion changed from primitive times through the renaissance period until today such that certain church conventions and rules were set about how the holy family could be portrayed. for instance: mary must always be in a blue mantle, jesus could only be in a white robe after the resurrection, jesus could no longer be seen pointing with his walking stick when performing a miracle, and so on.hope this