Materials

1. Animals

1.1. silk

1.2. wool

1.3. leather

2. Plants

2.1. wood

2.2. cotton

2.3. rubber

3. Found naturally in the ground

3.1. tin

3.2. gold

3.3. granite

4. Man-made

4.1. nylon

4.2. glass

4.3. plastic

4.4. styrofoam