diversity

1. animals

1.1. mammals

1.1.1. reptiles

1.1.1.1. amphibians

1.1.1.1.1. birds

2. fungi

3. insects

4. bacteria

5. characteristics

5.1. grow

5.1.1. reproduce

5.1.1.1. air food and water

5.1.1.1.1. responds to changes in surroundings