How is adjectival clause related to parts of speech?

Adjectival clause functions as an adjective.
Adjectival clause functions as an adverb.
Adjectival clause functions as a noun.
Adjectival clause functions as a verb.

Read the paragraph. in fact, teenagers contribute a great deal to their community. this is another reason why they must be taken into account when public policy is debated. over eighty percent of teens spend time volunteering at their schools and other organizations. this is an example of statistical analysis layering point of view outlining