The right word for the sentence is "memento".
It means a gift to remember something by. Like when you visit a place and buy a small thing to keep as a memory.
"Momento" is a common misspelling of "memento."
"Momentum" is about moving fast, not right here.
"Moment" means a short time, also not correct for this sentence.
So, the correct sentence is: "The principal presented the chief guest with a memento, as token of appreciation."
**from the information given by Claude AI as it is or edited.