I think "that" is the adjective clause because you can remove it without ruining the sentence.
Answer:
1.) Alliteration
Explanation:
[S]ilent [S]nake [S]lithers
Answer:
B. It has been my experience.
Explanation: When a problem presents itself, keep working at.
Answer:
It's blue. It means that it made the person sad and meloncholy
Explanation: