Answer:Pedometer
Explanation:bc it counts how much steps you took but also shows how much your heart is beating
Answer:
Because the people you have on that list already know that you need help and will help you they know the situation so they will help and you'll know who you can count on when they are added to that list
Explanation:
Hi !
because it maintains your internal physiological balance : respiration, blood pressure,.....whatever the environment changes
bye