The slippery slimy snake slithered into the room. This author likely chose alliteration to:

offer a description of the snake
create a creepy feeling of anticipation
identify the problem
tell an action

To offer a description of the snake

Explanation:

The adjectives “slippery” and “slimy” are alliteration. Alliteration is the repetition of consonant sounds at the beginning of words, so in this case we have “slippery” and “slimy”, with the repetition of the “s” consonant sound. Therefore the alliteration “slippery, slimy” is describing the snake.

make sure the topic of your persuasive essay is not something someone else is writing about.

it the climax in the poem