Fact 1: Astronauts require preserved food for extended flights.

Fact 2: Space travel is for trained astronauts only.

Given the two facts above, answer the question "what require preserved food for extended flights?" with the following options: 
- geese flocks
 - space travelers
 - Dehydration
 - space aliens
 - consumers
 - objects that have mass
 - athletes
 - small bees


 

  space travelers       