The bar chart compares changes in the populations of three marine animals in the Georgia Strait between 2006 and 2018.
Overall, it is clear that the dolphin population increased significantly over the period, while seals and whales showed some fluctuations but ended at similar levels to where they began.
In 2006, there were about 50 dolphins. This figure rose steadily throughout the period and reached approximately 85 by 2018, representing a considerable increase.
By contrast, the seal population started at nearly 40 in 2006 but declined gradually to around 22 in 2010. After that, the number recovered steadily and climbed to about 42 by the end of the period.
Meanwhile, the whale population experienced slight fluctuations. It stood at just over 25 in 2006, fell slightly in the following years, and then increased again to reach around 25 in 2018.
