Select the option that expresses the given sentence in passive voice.
Scientists have recently discovered a new species of marine life in the unexplored depths of the ocean.

Correct option is A

The correct passive voice of the given sentence is (a).
Explanation:
To change active to passive in present perfect tense, we use:
Structure:
Active voice: Subject + has/have + V3 + object
Passive voice: Object + has/have + been + V3 + by + subject
Active: Scientists have recently discovered a new species...
Passive: A new species has recently been discovered...
Example:
Active: She has written a novel.
Passive: A novel has been written by her.
Options (b), (c), and (d) are incorrect because:
· (b) uses the wrong tense "was being" (past continuous passive).
· (c) uses past perfect "had been" which doesn't match original tense.
· (d) uses simple past instead of present perfect.