| A | B |
|---|
| Main Idea | Animals have structures that help them get what they need from their enviornments. Different kinds of animals have different structures. |
| lungs | a structure some animals use to take in oxygen from air |
| gills | a structure some animals use to take in oxygen from water |
| shelter | a place in which an animal can stay safe |
| animals | living things |
| fish breathing | Water enters the fish's mouth and exits though the gills. As water flows out, the gills take in oxygen from the water. |
| fish moving | A fish moves forward by waving its muscular tail. Fins help the fish steer toward food or away from danger. |
| hummingbird | beats its wings so fast that it hovers like a helicopter |
| wasps | When wasps sense danger near their nest, they respond by stinging. |
| wolf | To jump, a wolf pushes off with its strong back legs. |
