What term describes helping a guest to the surface without losing your focus?

The term that describes helping a guest to the surface while maintaining focus is "Assist." This term signifies providing help while ensuring that the lifeguard remains aware of the environment and other potential safety concerns. In the context of lifeguarding, assisting someone typically involves supportive actions that do not compromise the lifeguard's attentiveness to other guests or the overall safety of the area.

Rescue is a more definitive action that often involves a greater risk and urgency, typically in situations where a life is in immediate danger. Support and intervention can imply various levels of assistance, but they may not specifically conjure the nuance of maintaining focus while providing help. Therefore, "Assist" is the most accurate term that encapsulates the essence of helping while being vigilant and aware.