How is communication defined in the context provided?

In the context provided, communication is defined as the exchange of information. This encompasses not only the sharing of facts and data but also the transfer of knowledge and understanding between individuals or groups. It implies a two-way process where information is sent, received, and interpreted, leading to comprehension and feedback.

While the other options touch on aspects of communication, they are more limited in scope. The exchange of opinions focuses on subjective views rather than the broader sharing of information. The transfer of legal documents is a specific type of communication that pertains to legal contexts and does not encompass the various forms and purposes of communication. The delivery of personal messages emphasizes individual communication but doesn't capture the comprehensive nature of information exchange that is central to effective communication in various settings, such as professional and social environments. Thus, the definition centered on the exchange of information accurately represents the full range of what communication entails.