In the poem "Work Without Hope" Samuel Taylor talk for a narrator that see how the nature is all busy, every single organism that is part of the ecosystem has a particular job to develop and is important, however he has no hope for work so he is just an observer not a participant showing that one should look to nature as an example for human behavior, the answer is D.
No, animals should not be in zoos.
A. Flash mobs seem both interesting and safe, unless participants are irresponsible.