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 areas.
(a) ii & iii; (b) i & ii;
(c) i & iv (d) ii & iv.
NCERT Class VIII
Science - Exemplar Problems
Chapter 7. Conservation of Plants and Animals