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.
1) oxygen. 2) bone size 3) inner core, outer core 4) 10
Close out of all ur tabs and try again. if that does not work try deleting the app and then try again..
Dissolving the sugar cube in water is a physical change. It doesn't alter the sugar's chemical structure like burning it or breaking it down with acid.
