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