It is good to cook healthy meals at home because, it saves money and it offers better nutrition.
C... if they’re testing people there must be some progress.
The underlined subject of the sentence the skyscraper that was built last year is a noun phrase.When determining the type of phrase, you first need to find its center, of the most prominent word. Here, the center is skyscraper, which is a noun, which means that the whole phrase is a noun phrase.
The correct answer is phrase. A phrase is a group of words that work together to express an idea and can function as a noun, adjective, verb, or adverb.