Which statement best explains the simile in this excerpt?

Read the excerpt from Part 4 of The Odyssey.

and on our starboard beam Charybdis, dire

gorge of the salt seatide. By heaven! when she

vomited, all the sea was like a cauldron

seething over intense fire, when the mixture

suddenly heaves and rises.

The sea is compared to a boiling pot, emphasizing its

churning.

The sea is compared to a boiling pot, emphasizing its

depth.

The sea is compared to heaven, emphasizing its

strength.

The sea is compared to heaven, emphasizing its size.

The answer is the first option: The sea is compared to a boiling pot, emphasizing its churning.

Explanation:

The excerpt is comparing vomiting, sea and fire. In this case, the first option is the correct one as "churning" refers to a mixture of something - -this context--. Option B is not possible as the depth has nothing to do with vomiting in first instance. The other option are definitely not possible as "heaven" here is only mentioned as a expression, not as the meaning of heaven per se. So basically, heaven here is not being compared whatsoever.