What chapter is this question about?
C. he appreciates the academic intensity
An adjective clause is a dependent clause that, like adjective which modifies a noun or pronoun. Adjective clauses begin with words such as that, when ,where, who, whom, which, and why...... hope that helps!!!
I can't really answer question 3 or 5 due to not seeing the passage or the picture to said passage, but I can answer question 4 for you. I would say the answer to 4 would be a.