In this sentence Yellow and black would be the compound subject. Yellow and black are both subjects and the use of the word 'and' lets you know it is a compound subject.
Answer:
he is a vegetarian;you wont get a meat at his home
Food consumption is used as a symbol for social status in the play. The more food is consumed by a person, the higher is his social status and the more prominent people he knows. Oscar Wilde uses the play to show that excessive society.