Answer:
O the silly seal sat in the sand
Step-by-step explanation:
Alliteration is a repetition of a letter or sound at the beginning of words. In this one, you see a repetition of the letter "s". This doesn't apply to any of the others. The one about homework, specifically, is an example of a simile, or comparing two things using "like" or "as". I don't remember what the one about Halloween is called, but it is just saying that these two things are related (Halloween is a holiday) so that has to have something to do with the other thing (green is a color). And I have no clue what the one about May is supposed to be.