In which type of organizational structure is decision-making authority shared with lower levels?

The organizational structure in which decision-making authority is shared with lower levels is best described by a flat structure. A flat organization minimizes the levels of management, allowing for greater autonomy among employees and encouraging collaboration and decision-making at various levels within the organization. This structure fosters an environment where feedback and input are valued from all members, leading to quicker decision-making and a more responsive organization.

A linear structure typically involves a clear chain of command with decision-making authority concentrated at the top levels of management. The scalar structure also emphasizes a vertical hierarchy where authority and responsibilities are clearly defined, but it does not necessarily imply shared decision-making with lower levels. A matrix structure is characterized by a dual reporting system, where employees report to both functional and project managers, but it doesn't inherently imply shared decision-making authority throughout the organization. Thus, the flat organization is the most fitting choice in this context for shared authority and participatory decision-making.