Correct spelling, explanation: says is third person singular form of the verb say. To create 3rd person singular form we add s to the end of the word – also when the word ends with y preceded by a vowel. Therefore sais is incorrect and says is the correct spelling.

Definition of says:
verb, third person singular of verb say, to use speech to express something, to communicate with speech
The rule says we don’t change “y” into “i” at the end of the word if there is a vowel before the “y”.
Jessica usually says nice things to every person she meets. She is so cute!

Incorrect spelling, explanation: this form is incorrect because in the word say, y is preceded by a vowel; this means we do not change y to i, but it remains and we only add s at the end (says) in case of creating third person singular form. Thus the correct form here should be says, not sais.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling