Final answer:
The conclusion drawn from the passage is that environmental protection efforts, such as those taken to conserve wild salmon populations, can result in both ecological benefits and positive economic impact, including industry growth and new job creation. The correct answer is option c.
Step-by-step explanation:
The passage demonstrates that environmental protection efforts, such as restoring salmon habitats in the Pacific Northwest, can lead to positive outcomes not only for the endangered species but also for the local economy and industries. It shows evidence that the decline in wild salmon populations was attributed to human activities like overfishing and pollution. The revival efforts, however, have contributed to an increase in salmon numbers and spurred industry growth, with the added benefit of creating new jobs. Hence, we can draw the conclusion that environmental protection can coincide with industrial growth and profitability.