- Plastic is a kind of material made by humans
- A plastic spoon is made of plastic
- So, a plastic spoon is made of a material that is made by humans

- "Fossils of seashells are found in a wooded area" is not relevant

- Natural means grown in nature
- Made by humans / artificial is the opposite of natural
- Hence, if something is made by humans then that something is not grown in nature

- A plastic spoon is made of a material that is made by humans
- If something is made by humans then that something is not grown in nature
- So, a plastic spoon is made of material that is not grown in nature

Hence, a plastic spoon is made of material that is not grown in nature
Which item below is NOT made from a material grown in nature?
- Plastic is a kind of material made by humans 
- Natural means grown in nature 
- Made by humans / artificial is the opposite of natural 
- A plastic spoon is made of plastic
- Fossils of seashells are found in a wooded area