Maxim entered the classroom, his heart racing. Today was the big day—the presentation of the "Living Organisms" project from pages 48 and 49 of his fifth-grade workbook. He had spent hours labeling the diagrams of cells and explaining the differences between plants and animals, just as Pakulova’s textbook instructed.

Sasha was busy looking at page 49, where they had to classify different types of mushrooms. "See what? I'm just trying to remember if a fly agaric is a producer or a decomposer."

"We have to finish the last question!" Sasha gasped, grabbing her pen. "The 'Environment' section is still blank. If we don't define the habitat, the animals will have nowhere to go!"