What is the function of gerund in this sentence One my favorite sounds children singing?

The gerund in the sentence "One of my favorite sounds is children singing?" is "children singing".

Here's how it functions:

* Gerund: "Children singing" acts as a noun phrase.

* Subject: It's the subject of the sentence, performing the action of "being" a favorite sound.

* Meaning: The sentence describes the sound of children singing as a favorite sound of the speaker.

The gerund phrase acts like a single noun, making the sentence concise and clear.