Correct option is C
The correct passive voice of the given sentence is (c) His bravado will be respected by people.
Rules of conversion:
· Identify the object (his bravado).
· Change the verb form to the passive structure: will + be + past participle.
Active Voice Structure: Subject + will + verb + object.
Passive Voice Structure: Object + will + be + past participle + by subject.
Example: The teacher will check the papers → The papers will be checked by the teacher.