Question

Select the sentence that uses a noun clause to combine the ideas below. Also identify the function of the noun clause.

We know most about a few things. The things which interest us are the things we know best.
We know most about what interests us.
Interesting things are the things that we know most about.
We know most about a few interesting things.
We know most about things when they interest us.
subject
direct object
predicate noun
object of a preposition
appositive

Answer 1

The only noun clause in the list you have is in the first sentence. in that, the clause 'what interests us' is the object of the preposition 'about.'