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Subject :NSO    Class : Class 6

A government campaign was conducted in an agricultural area where sparrow population was exterminated as these birds were known to eat grains and decrease crop yield. However, in the months that followed, grain production was severely reduced leading to famines in that area.

The given graph traces the population changes of one more species in that area after campaign.
Which of the following best explains this?

AThere was overgrowth of crops due to reduced sparrow population causing the crops to compete for available resources thereby leading to crop failure.
BThe crash in sparrow population caused the population of locusts (which sparrows prey upon) to spike, which in turn wiped out available crops in field.
CThe increase in the population of locust is not related with the decrease in the population of sparrow.
DNone of these


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