The graph below shows population variation in three wildlife species from 2011 to 2016 in North America and its coastal areas.

The provided line graph illustrates the data of population difference in variety of wildlife animals in the North America. The information is given for 2011 and 2016 years. Units are measured in number. Overall, it can be seen that the Dolphins had the maximum number of population while Bears had the least population in North American. Looking at the graph in detail, in 2011, the species of whales was around 75 thousand in North America. However, it declined by 25 thousand and reached close to 50 thousand in 2012. On the other hand, it shows fluctuated in whale population between 2012 and 2016 years. Analyzing the other two species, the Bears and Dolphins, both of them, the figure for the former one, it had 150 thousand population in 2011, but it continuously plunged from 150 to 1 thousand population throughout the period. Nevertheless, the later one, it had approximately 1000 population in 2011. In contrast, it drastically augmented by almost 180 population amid 2011 and 2016, respectively.