It may be the mother of the earth, the god of the earth, the source of life, and the tree of life mentioned in the prelude.
It may also mean your highness,,, Your highness Han Wenzhong sounds like mom,,,
This song is SMP style again. .
MAMA may also be just a modal particle with no characteristic meaning,,, similar to the predecessor Chu ~,,, Oh! Ah, hoo, choo choo. ,, You,,, Echo,,, ...