Answer:
B. To explain an origin of the term
Hopefully it will be helpful
Answer:
Biofuels may be cleaner and more sustainable than jet fuel.
Explanation:
Personally, I believe that sustainability is more important than financial stuff and has a longer-lasting impact.
The answer is A. Contented.
TeX is crying about his horse
The best answer is to expose the environmental threats posed by ridgetop development.