They are both considered metaphors, yes. The light of my life means the happiest thing that you have ever known. It's kind of an exaggeration, but it's metaphor. Roller coaster of emotions means that your mood swings up and down and all around like a roller coaster. I hope this helps you!
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The answer is B</span>
<span /><span><span>traditional stories, rooted in a particular culture, that attempt to explain something about the world</span>
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