| Migratory birds fly to far away areas during a particular time of a year. Which of the following conditions present in their habitat during that time are responsible for this behaviour? |
| (i) Unavailability of food. |
| (ii) Extreme weather conditions. |
| (iii) Over crowding. |
| (iv) Lack of nesting area. |
A) ii and iii
B) i and ii
C) i and iv
D) ii and iv
E) None of these
Correct Answer: B
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