Noun Clauses
I wonder where my keys are.
Noun Clause (Direct Object)
Because it has a low melting point, chocolate can be difficult to bake with.
Adverb Clause (difficult)
That my father should get a new car is my mother's idea.
Noun Clause ( subject - That my father should get a new car)
Areas of the park that are off-limits to citizens can be dangerous.
Adjective clause (area - that are off-limits to citizens)
Jason is a person who can physically dominate anything and anyone in the universe.
adjective clause (person - who can physically dominate anything and anyone in the universe)