The best way to combine sentences 4 and 5 is - One of the gods pulled out some of its roots for his pregnant wife, which created a hole in the floor of the Sky-World.
This option is correct because the word which is used here after the comma. The word which is a dependent adjective clause. There has to be a comma before this dependent adjective clause which modifies the whole action.
"A dependent clause is a group of words that contains a subject and verb but does not express a complete thought."
To know more about dependent clause click below:
brainly.com/question/2094166
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