You are presented with the question "Humans have collected and grown foods rich in what for thousands of years?" and the following answer choices: 
- glucose
 - bacteria
 - ferns
 - chlorine
 - acetic acid
 - Energy.
 - heat energy
 - Energy

Now knowing that humans have collected and grown mushrooms for food for thousands of years and foods rich in chlorine are mushrooms, parsley, sweet potato, rhubarb, and especially tomato, choose the best answer.


 

    chlorine     