Final answer:
The term that can mean completely underwater or fully involved in is 'Immersed' (C), which implies deep involvement or being underwater.
Step-by-step explanation:
The term that encapsulates the dual meanings of being completely underwater or fully involved in something is "Immersed" (C). This versatile word captures both the literal sense of being submerged in water and the metaphorical sense of being deeply engaged or involved in a particular activity, subject, or experience.
When describing something as "immersed," it suggests a thorough and comprehensive involvement, indicating a state of complete absorption or engagement. This could apply to someone deeply engrossed in a task, a person thoroughly invested in a subject, or an object fully submerged in water. The term seamlessly bridges the gap between the physical act of being underwater and the figurative sense of being entirely absorbed in a particular context.
While "submerged" and "engulfed" share similarities, "immersed" uniquely emphasizes active and profound involvement. It goes beyond the mere physical state of being under a surface, encompassing a broader spectrum of intense participation or focus.
On the other hand, "drowning" (D) specifically refers to a life-threatening situation where an individual experiences respiratory impairment due to being in or under a liquid, typically water. Unlike "immersed," "drowning" carries a more serious and potentially fatal connotation, focusing on the negative outcome of being submerged in water rather than the broader sense of involvement or absorption conveyed by "immersed."
In summary, "immersed" is the term that aptly captures both the literal and figurative dimensions of being completely underwater or fully involved in a particular situation.