In English conversations, people often say that they agree or disagree with each other. There are many ways of agreeing or disagreeing and the "one" you use depends on how strongly you agree or disagree.
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What does "one' refer to here?
I think it means way of agreeing or disagreeing - not sure.
That person is mostly right.
In this sentence, "one" is being used as a pronoun and is referring to the noun "way."
In this context, the word "one" is used as a pronoun to refer to a specific way (method or approach) of agreeing or disagreeing. It means that there are various methods or ways that people use to express agreement or disagreement during English conversations, and the choice of which method to use depends on the level or intensity of agreement or disagreement they feel.
