Overheard on a field trip with Girlie's class to a wetland

Wetland director to class: "So, now that I've described a little about what a wetland is, can any of you tell me why a wetland is important?" First grader waves hand wildly (not Girlie although it sounds a lot like her): "We sang a song about a woman who died and fell in the river and her body became food for the animals." Wetland director (picking chin up off of the floor): "Uhm, okay. Anybody else?" Hee, hee. They were singing Sweet Molly Malone recently. I think she died of a fever (and no one could save her, singing cockles, and mussels, alive, alive-o). I'm not sure the song specifies that she fell into the river and decayed but it's possible. I love seven-year-olds.