which of the following statements is  true? a. the nitrogen cycle is the most important cycle for life. b.the oxygen cycle is the least important cycle for life. c.life can be sustained without any of the cycles for life present. d.all cycles of matter are equally important for life to be sustained.    select the best answer from the choices provided

1. what other famous event was going in on africa in 1994? 2. why does the country of rwanda use francs as their currency? 3. when paul s neighbor (victor) gets attacked, what does paul do? why? 4. what was the significance of the phrase "cut the tall trees"? 5. when violence breaks out, who comes to ? who gets ? who does t get ? 6. when paul realizes no one is coming to the rwandan refugees, he tells them there is only one way for them to get . what is it? 7. what deal does george try to make with paul? 8. why didn t any foreign countries try to stop the hutus? 9. what event sparked the beginning of the genocide? who does that event get blamed on? 10. who was supplying the hutu army? 11. what did 19th century imperialism have to do with this 20 century genocide? 12. where did the classifications of hutu and tutsi come from in rwanda? 13. why are some people being and others are not? 14. if you were in paul s position, do you think your reaction would have been the same as his? explain. 15. how did the international community fail the people of rwanda? why were they so reluctant to act? what is our responsibility as global citizens in these kinds of events? how are events in rwanda and darfur conceded to 19th century imperialism?

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?