Answer:
<em>A. emphasize the power of nature</em>
Would be better if you said "Did you know you can't spell beautiful without u?" and then I'd be flattered.
The purpose of an adjective clause is using a subject and verb that provide a description of the sentence. Impact allow the reader to understand what is occurring and why it is occurring. Who cause the affects? Or where is it happening?
Word formation and spelling. Punctuation and style of writing.