Final answer:
Kevin's actions as a manager, who motivates by threats of job loss, reflect the assumptions of Theory X, which views employees as needing strict supervision and control.
Step-by-step explanation:
Based on the scenario described, where Kevin frequently warns employees about the risk of losing their jobs to motivate them, his management style aligns with Theory X assumptions. According to Douglas McGregor's conceptual frameworks, Theory X managers view employees as inherently disliking work and needing to be coerced or threatened with punishment to achieve organizational goals. This contrasts with Theory Y, where managers believe that employees naturally take pleasure in work and seek responsibility, thus motivating them with opportunities for input and participation leads to better outcomes.