Which of the following can change the external environment of an organization?

The correct choice is changes in social policy because such alterations can have a significant impact on the external environment in which an organization operates. Social policies dictate the regulations, funding, and services available within a community, which can affect how organizations function, what resources they can access, and the types of programs they need to implement. For instance, a new health policy may require organizations to adjust their services to meet new standards or to target funds toward different community needs.

In contrast, employee turnover, internal management changes, and staff training programs primarily affect an organization internally. Employee turnover relates to the staff's movement within the organization, impacting morale and productivity but not the broader environment. Internal management changes affect leadership and organizational structure but do not influence external factors directly. Similarly, staff training programs focus on developing the skills of employees within the organization and do not alter the external context in which the organization operates.