What is your favourite part of the newspaper?
My favourite section in the newspaper are the sports pages.
Because there are more than one type of sport that they talk about, we say - sports pages.
Therefore, because sports = plural - we say - are the sports pages.
Great job Andrei!
My favourite section in the newspaper is the sport pages.
My favourite section in the newspaper is the sports pages section.
The subject of your sentence, "section", is singular so the verb form must also be in its singular form, "is" in this case. To avoid the awkwardness of a plural object, I normally look at my word choice to see if there are alternatives that allow me to avoid the situation. I believe that, in this case, "section" can be used in place of "pages" without affecting your thought.