For children in Grade 4 learning about life systems.
From the Curriculum:
This strand focuses on habitats, the natural communities that depend on them, and the impacts that changes to habitats can have on interrelationships among plants and animals within these communities. Students will learn that living things (including humans) rely on other living things for the energy and resources they need to live. They will also investigate factors that alter various habitats and communities, including those factors that occur naturally and those that result from human action.
Plants and animals are interdependent and are adapted to meet their needs from the resources available in their particular habitats.
Changes to habitats (whether caused by natural or human means) can affect plants and animals and the relationships between them.