Final answer:
Organization theory is concerned with organization-wide issues, such as organization design and the relations between an organization and its environment. It explores how organizations function and interact with their internal and external environments.
Step-by-step explanation:
The subject that is concerned with organization-wide issues, such as organization design and the relations between an organization and its environment is organization theory. Organization theory explores how organizations function and interact with their internal and external environments, including topics such as organizational structure, culture, strategy, and change. It analyzes the factors that influence an organization's effectiveness, efficiency, and performance.