Which sentence describes the situation of the crew members accurately in passive voice?

The choice that accurately describes the situation of the crew members in passive voice is the one that uses a phrase indicating a perception or belief about their status.

In this context, "are feared to have been lost" effectively conveys a sense of concern or apprehension regarding the fate of the crew members, emphasizing that others (likely those who care about them) hold this belief. The use of "feared" adds a layer of emotional weight, suggesting that the situation is serious and is treated as a matter of distress.

The other options, while also in passive voice, differ in their connotations and implications. "Are considered to be lost," "are assumed to be lost," and "are acknowledged to be lost" present the situation more as a conclusion or recognition rather than an emotional response from others. Each of these options lacks the same sense of urgency and worry that "are feared to have been lost" encapsulates, making the selected option the most accurate representation of the crew members' situation as perceived by those outside.