I think "that" is the adjective clause because you can remove it without ruining the sentence.
Answer:
adjective
Explanation:
a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it
Answer:
a teddy bear symbolizing stuffed animal
Explanation:
This is because it's literal instead of being symbolic of something.
Answer:
What are u talking about?
Explanation:
What are u talking about?