That or who?

conjunction Introducing a clause that is the object of a verb, especially a reporting verb or verb expressing belief, knowledge, perception, etc

He told me that the book is a good read

determiner The (thing, person, idea, etc) indicated or understood from context, especially if more remote physically, temporally or mentally than one designated as “this”, or if expressing distinction

That book is a good read. This one isn't

pronoun The thing, person, idea, quality, event, action, or time indicated or understood from context, especially if more remote geographically, temporally or mentally than one designated as “this”, or if…

That's my car over there

adverb Denoting an equal degree

Here's the measurement – the ribbon must be that long, no longer and no shorter

noun Something being indicated that is there; one of those

conjunction As delayed subject

It is almost certain that she will come

pronoun Used to refer to a noun phrase or statement just made

They're getting divorced. What do you think about that?

adverb Denoting ‘as much’, ‘no less’

She said we waited for three hours, but I'm sure it wasn't that long

pronoun What person or people; which person or people; asks for the identity of someone; used in a direct or indirect question

You're getting married‽ Who to? (direct question)

noun A person under discussion; a question of which person

determiner whose

Who phone just rang?

pronoun Honorific alternative letter-case form of who, sometimes used when referring to God or another important figure who is understood from context

pronoun With antecedent as subject

That's the man who works at the newsagent. (defining)

pronoun With antecedent as object: whom

That's the man who I saw earlier

pronoun Whoever, he who, they who

Who dares wins

pronoun informalAlso used with names of collective nouns that are groups of people, especially singularly-named musical groups or sports teams

Who are the Miami Heat?