A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.
The officer cuts down the tree.
Cuts down = present tense. We make passive form of present tense using is/am/are + past participle of cut down. Option 1) the tree is cut down by the officer is the correct answer.
Note: You can't delete any information from the sentence while changing its voice. 3) eliminates down and thus, is not correct.