Take a look here, first, Who vs. Which vs. That | Grammar Rules.
Hi! The quoted above is an excerpt from Cambridge Dictionaries Online.arrival noun
2 [C] INFORMAL a baby which has recently been born:
Their new arrival was keeping them busy.
Q1: Why does the editor use "which" rather than "who" or "that". "which" is applied to an article. Right?
Q2: Can I use "who" or "that" to replace "which" in the context"? If no, why?
Thanks for the link. But according to its Rule 1 states, a baby is a person, isn't it? So why did the author use 'which'?
Rule 1.Who refers to people. That and which refer to groups or things.
Some people extend the rule and insist that, just as that should be used only in restrictive clauses, which should be used only in nonrestrictive clauses. By this thinking, you should avoid using which in sentences such as I need a book which will tell me all about city gardening, where the restrictive clause which will tell me all about city gardening describes what sort of book is needed. But this use of which with restrictive clauses is very common, even in edited prose. If you fail to follow the rule in this point, you have plenty of company. Moreover, there are some situations in which which is preferable to that. Which can be especially useful where two or more relative clauses are joined by and or or: It is a philosophy in which ordinary people may find solace and which many have found reason to praise. You may also want to use which to introduce a restrictive clause when the preceding phrase contains a that: We want to assign only that book which will be most helpful.
that instead of who. The man that wanted to talk to you just called back. Some people say that you can only use who and not that to introduce a restrictive relative clause that identifies a person. But that has been used in this way for centuries. It is a quintessential English usage, going back to the Old English period, and has been used by our best writers. So it is entirely acceptable to write either the man that wanted to talk to you or the man who wanted to talk to you.
Read more here http://www.bartleby.com/64/C001/062.html
The girl that I marry will have to be...
7 Brides for 7 Brothers.
The Man That Got Away.
Hi Soup, thank you very much for your responses again and again. Good night.
Hi David L.,
Thanks for your response. I'd like to sleep it on. I am too sleepy now. Bye bye. :)
Note that, choosing between who and restrictive that/which has something, perhaps a lot, to do with objectivity vs subjectivity. That is, the dictionary provides a definition in the form of objective "a baby which is ...", rather than the subjective, "a baby who is ...".
Hope that helps.
You are helpful. Thank you!
Mum: The baby's crying again.
Dad: It must be time to feed it again.
This is becoming less common since people are realising that children are people in their own right; but you'll still hear it.
It might have some influence on why the dictionary uses "which".