It’s been a long time since I read this book but I’m pretty sure they had burns.
Emissions has to the the answer. Though it could be Frequency range, but I doubt it.
The second one hope this helps
I wanna say that your answer is B. Let me know if you get it right!
A celebration of Native Americans returning to their old ways of life. ... What does the Grand Coulee Dam represent to Native Americans? It represent great change on their way of life. The dam blocks the river which is causing negative effects on the salmon population.
Hope this helps.