Select from: 1. edible. 2. Energy.. 3. exercise. 4. Cooking. 5. nutrients. 6. Proteins. 7. oysters. 8. Energy.
Q: You are presented with the quiz "Having what things has a positive impact on an organism 's health?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "having food has a positive impact on an organism 's health" and "and anything edible is food". So, what's the best answer to the question?
A:
1.