You are presented with the question "What causes food poisoning?" and the following answer choices: 
- Pesticides
 - Not eating
 - headache
 - microorganisms
 - one celled organisms
 - harmful substances
 - influenza
 - sleeping

Now knowing that microorganisms cause food to spoil and food poisoning occurs when spoiled food is eaten, choose the best answer.


 

    microorganisms     