What type of communication involves both vertical and horizontal lines?

The type of communication that involves both vertical and horizontal lines is best described as formal lines of communication. Formal communication refers to the structured flow of information within an organization, where messages follow established paths and protocols. This structure ensures that information is disseminated in a systematic way, connecting different levels of the hierarchy (vertical lines) as well as facilitating interaction across departments or teams (horizontal lines).

In a healthcare setting, for instance, formal lines of communication are essential for maintaining clarity and consistency in patient care and staff collaboration. This can include information flowing from management to staff, as well as between colleagues in different departments. Understanding formal communication is critical for healthcare aides as it helps them navigate roles and responsibilities effectively, ensuring that everyone involved in patient care is aligned on procedures and policies.