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. Key Start of campaign of The given graph traces the population changes of one more species in that area after campaign. Which of the following best explains this?
A There was overgrowth of crops due to reduced
sparrow population causing the crops to compete
for available resources thereby leading to crop
failure.
B The crash in sparrow population caused the
population of locusts (which sparrows prey upon)
to spike, which in turn wiped out available crops
in field.
C Sparrows actually did not consume grains but
instead consumed pests that feed on grains.
D None of these