Carbon and oxygen are both what in an ecosystem? answer fast, my exam is in less than 24 !

Plants create the majority of the oxygen we breathe through a process called photosynthesis. In this process plants use carbon dioxide, sunlight, and water to create energy. In the process they also create oxygen which they release into the air.
I hope that helps at least a little bit. Good luck on that exam. 

Serías guapo, i have no idea if this is right or not but i tried 

Jonathan swift is using a satirical approach to make awareness to the fact that there are too many beggars (which include women and young children) on the streets. his solution? eat the children. yes this sounds like the craziest thing in the world but it's a solution. the children could be sold to landlords to pay rent and the family could have stuffed bellies. he lists the advantages, disadvantages, and the rebuttal to the disadvantages to support his claim. he also suggest what age should be the highest price and how to cook them. in the end, he excludes himself from his solution. all i all, swift uses a satirical approach to get people aware of the beggars that flood their streets.if you need more for "a modest proposal", i am here.