Ecosystems. Biomes. Those words were not foreign words to Kat. She's read them from different Muggle reference books you know. Oh well, at least it wouldn't be that hard this term... And hopefully it would be something worthwhile to learn for OWLs. Hmm... She thought for a while about her answer so that she would not be making wrong answers. She hated saying wrong answers, definitely. Once she sorted out the answer she thought was good enough in her head, Kat decided to speak. "Ecosystems are the communities of organisms that are both living and nonliving." she said. Kat wanted to speak more but she saved them for others. She was being considerate these days. How odd. "On the other hand, biomes are the places where the organisms live in. The two types are terrestrial which is land, and aquatic which is water." That's enough I guess.