You are presented with the question "what food is required for space travel?" and the following answer choices: 
- hydration
 - humans
 - Energy.
 - irradiated
 - heat energy
 - nutrients
 - Proteins
 - survival

Now knowing that astronauts require preserved food for extended flights and food has been irradiated for our astronauts for over 30 years, choose the best answer.


 

    irradiated     