Imagine you are writing a poem about a fun birthday party. which of the following words has the appropriate connotation for the situation? shrieks giggles wails growls

Well you don't shriek at a fun party or else people would call you weird XD, and you wouldn't growl because you're a human, not an animal, and again you wouldn't wail because you're a human, not an animal XD

Giggles

Explanation:

Wail can be defined as to:  "give a cry of pain, grief, or anger."

Shriek can be defined as a: "utter a high-pitched piercing sound or words, especially as an expression of terror, pain, or excitement."

Growl can be defined as: "of an animal, especially a dog) make a low guttural sound in the throat."

None of these pass a very good connotation, so we can surely discard all of them and use Giggles, which is: "a light, silly laugh."

is there a year set? the question is incomplete