Ecosystems, ecosystems, what did Sky remember about those......

Not much really. Which was just sad considering that they had just studied this stuff at her muggle school. Summer really had made her brain soft! Not good. At all. She racked her brain some more. Finally she had what she thought was the answer. "An ecosystem is all the animals and plants in a set area and the ways they relate to each other." At least, that better be it, or she was asking her Biology teacher for a refund on her time.