What is the function of the noun clause in this sentence?

kam knew that she could control her breath.

a. appositive
b. indirect object
c. subject
d. direct object

Allusion and illusion. an allusion is an indirect reference, whereas an illusion is something that is unreal or incorrect. each of the nouns has a related verb form: allude “to refer indirectly to,” and illude (not a very common word), which may mean “to delude or deceive” or “to subject to an illusion.”