What term describes a firm's strengths that cannot be easily imitated by competitors?

The term that best describes a firm's strengths that cannot be easily imitated by competitors is "Distinctive Competencies." This concept focuses on unique capabilities or resources that give a firm a competitive advantage over its rivals. Distinctive competencies are built through a combination of factors such as proprietary technology, skilled personnel, or superior management practices that are deeply embedded in the fabric of the organization, making them difficult for competitors to replicate.

While "Internal Properties" might refer to capabilities or resources within a firm, it does not capture the essence of uniqueness and advantage that is characteristic of distinctive competencies. "External Audits" pertain to assessing external environments and factors affecting a business, which is unrelated to the internal strengths of an organization. "Interrelated Properties" could imply various connections within a firm’s offerings but lacks specificity in terms of competitiveness.

In summary, distinctive competencies highlight the unique aspects that set a company apart in the marketplace, contributing directly to its success in a competitive landscape.