The sentence in which the adverb clause modifies an adjective is the second one - The veteran appeared proud as he saluted the flag.
The adjective here is <em>proud</em>, and the adverbial clause is <em>as he saluted the flag. </em>As you can see here, that clause is describing the adjective in more detail.
When did the veteran appear proud? - As he saluted the flag (it obviously modifies the word <em>proud</em>)
<span>a.Dee thinks that the quilts are works of art that are too precious for everyday use</span>
This means that sometimes, you should trust your emotions rather than your brain. Sometimes, even if something seems logical in the first place, your heart may tell you that it is not right, or that it shouldn't be like that, and it may be the time to choose to follow your heart rather than your logic.
