to make the food less messy to eat to preserve the food for extended flights to increase the food's nutritional content to keep the food from floating off the plate
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Why is some food dehydrated for astronauts to eat in space?
Possibilities:
- to make the food less messy to eat
- to preserve the food for extended flights
- to increase the food's nutritional content
- to keep the food from floating off the plate

to preserve the food for extended flights