Direction: In the following questions, a sentence has been given in Active voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive voice.

प्र:

A great deal of harm is caused to the environment by us.

• 1
  We cause a great deal of harm to the environment.
• 2
  The environment is being caused a great deal of harm by us.
• 3
  We have caused a great deal of harm to the environment.
• 4
  The environment causes a great deal of harm to us.