Smoking had been linked to one out of every 5 deaths
The answer is Circulatory System. It is responsible for moving blood and oxygen around the body, etc. (Brainiest answer plz and thank you) Hope this helped!
Answer:
Digestive disorders – diarrhoea and colicky pains. Nervous disorders – hyperactivity, insomnia and irritability.
I would say Frequency is how often you perform an activity, and Intensity is how hard/intensely you perform the activity.
