The given illustration of the line graph compares the population trends of three animal species: bears, dolphins, and whales-over a 6-year period, between 2009 and 2014.
Overall, it is obvious that the number of bears experienced a significant increase, while the number of dolphins dramatically decreased. In contrast, the number of whales fluctuated during the timeframe.
In 2009, the total number of dolphins was approximately 157, which was the highest among three species in that year. However, the population of dolphins declined gradually, and the population of bears surpassed dolphins by 2010. The population of dolphins went down sharply and fell to zero in 2014. In comparison, the number of whales always fluctuated over the period. The whale population stood at 80 in 2009 and then declined to about 55 in 2010. Even though the number of whales declined, it rose sharply to 100 in 2011. However, it was fell again to approximately 75 from 2012 to 2014. Whereas the other two animal species reduced their quantity, the bear population grew considerably and reached a peak of almost 190, even though it had the lowest initial population.
So?
