Choose the sentence in the Active Voice:

The correct answer is Option (4) → The wind blew down the trees.

Active voice:

• In the active voice the subject does the action: subject + verb + object.
• In the passive voice the receiver of the action becomes the subject, and the verb takes the form be + past participle, often with "by + doer".
• This sentence: the wind (doer) blew down (verb) the trees (object), so it is in the active voice.
  Example: The cat caught the mouse.

Why the Other Options are Incorrect?

Option 1: The film was directed by Satyajit Ray. — Incorrect. "was directed by" is passive; the active is "Satyajit Ray directed the film."

Option 2: The door was opened by the owner of the house. — Incorrect. "was opened by" is passive; the active is "The owner of the house opened the door."

Option 3: We are taught English by Mrs. Mithai. — Incorrect. "are taught by" is passive; the active is "Mrs. Mithai teaches us English."