The subject is sponge because that is what is the main point of the sentence is.
Answer:
The answer is that it keeps him from drowning. The scarf has magical powers that kept Odysseus alive when Poseidon wrecked his boat. He makes it Phaeacia where he is helped by the King who listens to his stories. He makes it back to Ithaca after that.
Explanation:
It must have been my destiny to become interested in biology. My father and mother are both scientists. Obstract run on