What text are you talking about. Please fix your question.
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.
Answer: The addition of able turns them into adjectives
Explanation: Noticeable- it becomes an adjective, describing something that can be easilt seen.
Believable- it also becomes an adjective, describing omething that can be easily believed or credible.
Fanboys mean first letter of each coordinator— For, And, Nor, But, Or, Yet, So.
Here is a sentence I made, he was indignant at being the object of suspicion