Classification
作者：Jesse Berg
1. Group 3 (i.e. birds)
1.1. Characteristics
1.2. Examples
2. Group 4 (i.e. mammals)
2.1. Characteristics
2.2. Examples
3. Group 1 (i.e. reptiles)
3.1. Characteristics
3.2. Examples
4. Group 2 (i.e amphibians)
4.1. Characteristics
4.2. Examples
5. Group 2 (i.e fish)
5.1. Characteristics
5.2. Examples
