Questions: Marcus believes that people desire and form relationships with others who are similar in terms of physical attractiveness. Marcus subscribes to equity theory. social penetration theory. social exchange theory. the matching hypothesis.

The answer is the matching hypothesis.

Equity theory focuses on the balance of contributions and benefits in a relationship, suggesting that people are happiest in relationships where the give-and-take ratio is balanced. It does not specifically address physical attractiveness.

Social penetration theory describes the process of relationship development through increasing levels of self-disclosure. It does not focus on physical attractiveness as a primary factor in forming relationships.

Social exchange theory posits that relationships are formed and maintained based on the costs and rewards associated with them. While attractiveness can be a factor, this theory is broader and includes various other factors like emotional support, financial stability, etc.

The matching hypothesis specifically suggests that people are more likely to form and succeed in relationships with others who are similar in terms of physical attractiveness. This directly aligns with Marcus's belief.