Tie-in is basically meaning to elaborate or give information to the prompt
Your poem is very 'poetic', shall I say lol. I think it is an amazing tribute as a summary of a war. Keep up the great work!
The correct answer is The alligator slipped quietly into the water.
The first sentence does not agree since alligators should be a singular form, while the second and third are nonsensical because of lack of information.
