student asking question

What does "it" refer to here? Is it necessary to put there?

teacher

Native speaker’s answer

Rebecca

"It" is necessary here because the speaker is specifically referring to what the "user guide" has to say about "it". "It" refers to the house that is for sale that is previously mentioned. If "about it" is omitted, that would mean that they were looking for any information in the "user guide", not specifically information about "it".

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