Adjectives are descriptive words that describe other words and answer a question.
Thus, in your sentence, the adjective is the word red, as is tells the reader what color the shirt is.
Answer:
1. The Narrator
2. First Person
3. Third Person
4. Second Person
5. Plot
6. I'm not sure about this one
Because the similarities are not the same as the different
We can't see underlining here, but here, I think this will be helpful:
"I read a novel" would be the intependent clause: it does not need the other one to be complete.
"until the guests arrived" is the subordinate clause: it needs the independent, main clause to be complete.
He was seen as honest and reliable.