Fact 1: Astronauts require preserved food for extended flights.

Fact 2: Food has been irradiated for our astronauts for over 30 years.

Given the two facts above, answer the question "what food is required for space travel?" with the following options: 
- hydration
 - humans
 - Energy.
 - irradiated
 - heat energy
 - nutrients
 - Proteins
 - survival


 

    irradiated     