Final answer:
Option (4), Lord Capulet is the patriarch of the Capulet family in Shakespeare's 'Romeo and Juliet,' holding authority over the family and influencing key events in the play.
Step-by-step explanation:
The patriarch of the Capulet family in William Shakespeare's Romeo and Juliet is Lord Capulet. In traditional family structures during Shakespeare's time and within the context of the play, the patriarch is the male head of the family, wielding considerable authority over his household.
This is true for Lord Capulet, who as the father figure, has a significant role in the play's events, making decisions that impact his family and the narrative, especially concerning marriage arrangements for his daughter Juliet.