Which communication strategy are they using?

Direct communication involves straightforward and unambiguous expression of thoughts or feelings without subtleties or indirectness. While the acquaintances are indeed communicating clearly, the essence of their interaction focuses more on building a connection rather than just conveying information directly, which is why this choice does not capture the essence of their strategy.

Ambiguous communication is characterized by unclear or vague messages that can be interpreted in multiple ways. The interaction described is quite the opposite, as the use of names and eye contact indicates clarity and intentional engagement. Thus, this choice does not apply to the situation where the acquaintances are actively trying to connect and understand each other.

Flippant communication is casual and often dismissive, lacking seriousness or depth. This does not align with the context of the acquaintances' interaction, as they are actively using nonverbal cues and names to foster a more meaningful connection. Therefore, this choice is not relevant to the communication strategy being employed.