A clarifier or a word that describes a noun
His confidence is transformed by the crowd’s response.
Scotty is described as being a "quavering husk...just moments before." This shows his lack of confidence and anxiety about being on stage. Once the crowd's enthusiasm and excitement for his performance reached him, it is described as "lifting him off his stool...unleashing something strong, charismatic, and fierce." This change in his demeanor shows his confidence grow in response the crowd.
It is a metaphor because the sentence is comparing two different things without using the word "as" or "like".
Answer:
"If you’re serious about getting healthy, it’s imperative that you follow a healthy lifestyle, make the right food choices, and exercise regularly."