The graph below shows the changes in two populations of herbivores in a grassy field. A possible reason for these changes is that

777-300

  • [AIIMS 2009]
  • A

    all of the plant populations in this habitat decreased

  • B

    population $B$ competed more successfully for food than population $A$ did

  • C

    population $A$ produced more offspring than population $B$ did.

  • D

    population $A$ consumed the members of population $B$.

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