In the beginning of "The World on Turtle's Back," why did the husband become "terrified"?

He was terrified the he might never see his wife again.
He was terrified that his wife might fall through the hole in the sky.
He was terrified that he would be punished for marring a sacred tree.
He was terrified that the Great Tree would fall into the ocean.

He was terrified that his wife might fall through the hole in the sky.

In the beginning of "The World on Turtle's Back," the husband became "terrified" because he was afraid that his wife might fall through the hole in the sky.