Which lines from the poem show the sea is cruel but has a facade of beauty and warmth

I think it is

"A savage beguiler In sheathings of silk"

The answer is the last one because the poem describes the sea as savage but beautiful.

you need need more details so we can understand what your asking us.

first of all, dante wanted to write an account of the search for spiritual atonement and salvation, and this desire drew heavily from dante's own experiences. dante was living in exile while writing inferno and so, much like his poetic counterpart, he felt like he had lost his way and needed direction.

explanation: