Possible answers:
Little lazy lions lay languidly
Good green groceries give glee
Always ask an able alpaca
Step-by-step explanation:
You don't have to use any of the answers I gave - those are just examples. Basically, alliteration is the repetition of the same sound at the beginning of a group of words. I encourage you to come up with your own - it's not difficult and using a thesaurus can be helpful as well. Let me know if you need more help! :)