Which sentence from the passage is written in passive voice?

3.

Explanation:

The simplest way to describe the two 'voices' is by example. An active voice would be, "(name) threw the ball", though a passive voice would be "the ball was thrown by (name)."  

If the action is in front of the subject (e.g the ball), then it would be in an active voice. If the action is behind the subject, then it's in a passive voice. (hint hint most passive voices would have 'was' in the sentence).

orwell was frustrated by his position due to constant teasing by the burmese people.

explanation: smple