General Studies · Theories of Sleep

Consider the following statements comparing the Restorative Theory and the Adaptive (Evolutionary) Theory of sleep: I. The Restorative Theory asserts that sleep is essential for memory consolidation, clearing out brain metabolic waste, and physical tissue repair. II. The Adaptive Theory posits that sleep evolved to enhance survival by conserving energy during inefficient activity periods and reducing the risk of predator encounters. III. The Adaptive Theory emphasizes that the primary purpose of sleep is the secretion of growth hormone and the physical repair of neural structures. IV. The Restorative Theory explains species-specific sleep patterns as an evolutionary adaptation based on safety, resource use, and ecological niches. Which of the statements given above are correct?