Directions : In these questions , a part of the sentence is given in bold . Below are given alternatives to the bold part at (A) , (B) and (C) which may improve the sentence . Choose the correct alternative . In case no improvement is needed you answer is (D ) .

Q:

When the vegetation is altered, the animal life also changed.

• 1
  No substitution required
• 2
  changed
• 3
  also changes
• 4
  is changing