1. eating healthy foods.
2. getting enough sleep.
3. getting enough exercise
4. managing stress
5. washing your hands consistently.
All of those things helps your immune system by strengthening it or by keeping germs away which intern helps prevent you from getting sick.
I hope this helps. Let know if anything is unclear.
Answer: If you could be doing anything, anywhere right now, what and where would it be?
Explanation:
Answer
6=C
7=All of the above
Explanation
I believe the word your missing is "absolute" hope it helps:)