The graph below illustrates the relationship between fishing effort and the catch of large predatory fish, like tuna, during the past 40 years.
What best explains the pattern illustrated in this graph?

Question

The graph below illustrates the relationship between fishing effort and the catch of large predatory fish, like tuna, during the past 40 years. 
What best explains the pattern illustrated in this graph?

Quizplus · Accepted Answer

The graph shows a significant decline in catch of large predatory fish, despite increasing fishing effort. This suggests that highly efficient harvesting technologies are removing these fish faster than they can naturally replenish their populations. Therefore, choice D is the best explanation. Choices A and B are not supported by the graph, and choice C is only partially correct as it describes the impact of biomagnification on these fish, but does not fully explain the observed pattern.

The Graph Below Illustrates the Relationship Between Fishing Effort and the Catch